master > master: code - max teilsumme x 2 hinzugefügt
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@ -6,3 +6,4 @@
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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from code.algorithms.search.exports import *;
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from code.algorithms.sum.exports import *;
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@ -19,6 +19,9 @@ class OneShot(object):
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def __init__(self):
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self.state = True;
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def setState(self, state: bool):
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self.state = state;
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def reload(self):
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self.state = True;
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@ -56,7 +59,9 @@ def algorithmInfos(
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@functools.wraps(func)
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def func_wrapper(**inputs):
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try:
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state = nonnestedRecursion.state and nonnestedAlgorithms.state;
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state1 = nonnestedAlgorithms.state;
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state2 = nonnestedRecursion.state;
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state = state1 and state2;
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if state:
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# Initialisierung
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DisplayStartOfAlgorithm(name.title(), **inputs);
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@ -68,8 +73,8 @@ def algorithmInfos(
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nonnestedRecursion.trigger();
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nonnestedAlgorithms.trigger();
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outputs = func(*[], **inputs);
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nonnestedAlgorithms.reload();
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nonnestedRecursion.reload();
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nonnestedAlgorithms.state = state1;
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nonnestedRecursion.state = state2;
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if state:
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# benenne Outputs:
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outputs_ = outputs if isinstance(outputs, tuple) else tuple([outputs]);
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@ -83,7 +88,8 @@ def algorithmInfos(
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DisplayMetrics();
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DisplayEndOfAlgorithm(**outputsNamed);
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except Exception as e:
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nonnestedRecursion.reload();
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nonnestedAlgorithms.state = state1;
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nonnestedRecursion.state = state2;
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raise e;
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return outputs;
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return func_wrapper;
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@ -9,3 +9,4 @@ from code.algorithms.search.sequential import SequentialSearch;
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from code.algorithms.search.binary import BinarySearch;
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from code.algorithms.search.interpol import InterpolationSearch;
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from code.algorithms.search.jump import JumpSearchLinear;
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from code.algorithms.search.selection import SelectionAlgorithm;
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46
code/algorithms/search/selection.py
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46
code/algorithms/search/selection.py
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@ -0,0 +1,46 @@
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#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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# IMPORTS
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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from local.maths import *;
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from local.typing import *;
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from code.core.log import *;
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from code.algorithms.search.sequential import SequentialSearch;
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from code.algorithms.methods import *;
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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# GLOBAL VARIABLES/CONSTANTS
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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#
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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# CHECKS
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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def preChecks(L: List[int], **_):
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assert L == sorted(L), 'Ungültiger Input: L muss aufsteigend sortiert sein!';
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assert L == list(sorted(set(L))), 'Ungültiger Input: L darf keine Duplikate enthalten!';
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return;
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def postChecks(L: List[int], x: int, index: int, **_):
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value = L[index] if index >= 0 else None;
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assert value == x, 'Der Algorithmus hat versagt.';
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return;
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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# ALGORITHM jump search
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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@algorithmInfos(name='Auswahlproblem (i. Element)', outputnames='index', checks=True, metrics=True, preChecks=preChecks, postChecks=postChecks)
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def SelectionAlgorithm(L: List[int], i: int) -> int:
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'''
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Inputs: L = Liste von Zahlen, i = Ordinalzahl
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Outputs: Position des i. kleinste Element, x, in L, sonst −1. Beachte i=0 <==> Minimum.
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'''
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## TODO
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return -1;
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0
code/algorithms/sum/__init__.py
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0
code/algorithms/sum/__init__.py
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9
code/algorithms/sum/exports.py
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9
code/algorithms/sum/exports.py
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#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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# EXPORTS
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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from code.algorithms.sum.maxsubsum import MaxSubSum;
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from code.algorithms.sum.maxsubsum_dc import MaxSubSumDC;
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59
code/algorithms/sum/maxsubsum.py
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code/algorithms/sum/maxsubsum.py
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#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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# IMPORTS
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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from local.maths import *;
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from local.typing import *;
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from code.core.log import *;
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from code.algorithms.methods import *;
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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# GLOBAL VARIABLES/CONSTANTS
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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#
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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# CHECKS
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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def preChecks(L: List[int], **_):
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assert len(L) > 0, 'Liste darf nicht leer sein.';
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return;
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def postChecks(L: List[int], **_):
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# TODO
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return;
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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# ALGORITHM max sub sum
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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@algorithmInfos(name='MaxSubSum (Maximale Teilsumme)', outputnames=('maxSum', 'index_from', 'index_to'), checks=True, metrics=True, preChecks=preChecks, postChecks=postChecks)
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def MaxSubSum(L: List[float]) -> Tuple[float, int, int]:
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'''
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Inputs: L = Liste von Zahlen
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Outputs:
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- maxSum = Wert der maximalen Summe einer Teilliste aufeinanderfolgender Elemente
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- u, v = Indexes so dass die Teilliste [L[u], L[u+1], ..., L[v]] die maximale Summe aufweist
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'''
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maxSum: float = 0;
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u: int = 0;
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v: int = 0;
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for i in range(len(L)):
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for j in range(i+1, len(L)):
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thisSum = 0;
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# NOTE: Schleibe über Indexes von von i bis j
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for k in range(i, j+1):
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AddToCounter();
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thisSum += L[k]
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if thisSum > maxSum:
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logDebug('max Teilsumme aktualisiert: Summe L[i] von i={i} bis {j} = {value}'.format(
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i = i, j = j, value = thisSum
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));
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maxSum, u, v = thisSum, i, j;
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return maxSum, u, v;
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145
code/algorithms/sum/maxsubsum_dc.py
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145
code/algorithms/sum/maxsubsum_dc.py
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#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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# IMPORTS
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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from local.maths import *;
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from local.typing import *;
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from code.core.log import *;
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from code.algorithms.methods import *;
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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# GLOBAL VARIABLES/CONSTANTS
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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#
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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# CHECKS
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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def preChecks(L: List[int], **_):
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assert len(L) > 0, 'Liste darf nicht leer sein.';
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return;
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def postChecks(L: List[int], **_):
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# TODO
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return;
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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# ALGORITHM max sub sum
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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@algorithmInfos(name='MaxSubSum (Maximale Teilsumme mit D & C)', outputnames=('maxSum', 'index_from', 'index_to'), checks=True, metrics=True, preChecks=preChecks, postChecks=postChecks)
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def MaxSubSumDC(L: List[float]) -> Tuple[float, int, int]:
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'''
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Inputs: L = Liste von Zahlen
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Outputs:
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- maxSum = Wert der maximalen Summe einer Teilliste aufeinanderfolgender Elemente
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- u, v = Indexes so dass die Teilliste [L[u], L[u+1], ..., L[v]] die maximale Summe aufweist
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'''
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maxSum = 0;
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u = 0;
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v = -1;
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if len(L) == 1:
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## wenn Liste aus 1 Element besteht, nicht teilen:
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if L[0] > maxSum:
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v = 0;
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maxSum = L[0];
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else:
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u = math.ceil(len(L)/2);
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Ll = L[:u];
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Lr = L[u:];
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## berechnet maximale Teilsumme der linken Hälfte:
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maxSum1, u1, v1 = MaxSubSumDC(L=Ll);
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## berechnet maximale Teilsumme der rechten Hälfte:
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maxSum2, u2, v2 = MaxSubSumDC(L=Lr);
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u2, v2 = u2 + len(Ll), v2 + len(Ll); # offsets kompensieren
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## berechnet maximale Teilsumme mit Überschneidung zw. den Hälften:
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maxSum3, u3, v3 = lrRandSum(Ll=Ll, Lr=Lr);
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## bestimme Maximum der 3 Möglichkeiten:
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maxSum = max(maxSum1, maxSum2, maxSum3);
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if maxSum == maxSum1:
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maxSum, u, v = maxSum1, u1, v1;
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logDebug('max Teilsumme kommt in linker Partition vor: Summe L[i] von i={i} bis {j} = {value}'.format(L = L, i = u, j = v, value = maxSum));
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elif maxSum == maxSum3:
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maxSum, u, v = maxSum3, u3, v3;
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logDebug('max Teilsumme kommt in Überschneidung vor: Summe L[i] von i={i} bis {j} = {value}'.format(L = L, i = u, j = v, value = maxSum));
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else: # elif maxSum == maxSum2:
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maxSum, u, v = maxSum2, u2, v2;
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logDebug('max Teilsumme kommt in rechter Partition vor: Summe L[i] von i={i} bis {j} = {value}'.format(L = L, i = u, j = v, value = maxSum));
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return maxSum, u, v;
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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# AUXILIARY METHODS
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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def lrRandSum(Ll: List[float], Lr: List[float]) -> Tuple[float, int, int]:
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'''
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Bestimmt maximale Teilsumme einer Teiliste einer Liste,
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wobei die Liste in zwei Intervalle partitioniert ist
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und die Teilliste beide überschneidet.
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Inputs: Ll, Lr = eine Partition einer Liste von Zahlen in zwei Intervalle
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Outputs: maxSum, u=0, v
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'''
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maxSumL, u, _ = rRandSum(L=Ll);
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maxSumR, _, v = lRandSum(L=Lr);
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maxSum = maxSumL + maxSumR;
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v += len(Ll) # offsets kompensieren
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return maxSum, u, v;
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def lRandSum(L: List[float]) -> Tuple[float, int, int]:
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'''
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Bestimmt maximale Teilsumme aller nicht leeren linken Segmente einer Liste.
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Inputs: L = Liste von Zahlen
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Outputs: maxSum, u(=0), v
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'''
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n = len(L);
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## berechne kumulative Summen (vorwärts)
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AddToCounter(n);
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total = L[0];
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M = [total];
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for i in range(1, n):
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total += L[i];
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M.append(total);
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## berechne maximum
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AddToCounter(n);
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maxSum = M[0];
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u = 0;
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v = 0;
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for i in range(1, n):
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if M[i] > maxSum:
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v = i;
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maxSum = M[i];
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return maxSum, 0, v;
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def rRandSum(L: List[float]) -> Tuple[float, int, int]:
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'''
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Bestimmt maximale Teilsumme aller nicht leeren rechten Segmente einer Liste.
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Inputs: L = Liste von Zahlen
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Outputs: maxSum, u, v(=len(L)-1)
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'''
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n = len(L);
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## berechne kumulative Summen (rückwärts)
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AddToCounter(n);
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total = L[n-1];
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M = [total];
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for i in range(0, n-1)[::-1]:
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total += L[i];
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M.insert(0, total);
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## berechne maximum
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AddToCounter(n);
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maxSum = M[n-1];
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u = n-1;
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v = n-1;
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for i in range(0, n-1)[::-1]:
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if M[i] > maxSum:
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u = i;
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maxSum = M[i];
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return maxSum, u, v;
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@ -6,7 +6,7 @@
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# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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import os;
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import sys
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import sys;
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sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))));
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@ -53,7 +53,11 @@ def LoopThroughCases(path: str):
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inputs = GetAttribute(case, 'inputs', expectedtype=dict, default={});
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try:
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if command == 'algorithm-search-sequential':
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if command == 'algorithm-sum-maxsub':
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MaxSubSum(L=inputs['L']);
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elif command == 'algorithm-sum-maxsub-dc':
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MaxSubSumDC(L=inputs['L']);
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elif command == 'algorithm-search-sequential':
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SequentialSearch(L=inputs['L'], x=inputs['x']);
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elif command == 'algorithm-search-binary':
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BinarySearch(L=inputs['L'], x=inputs['x']);
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