master > master: code - Auswahlproblem hinzugefügt
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@ -9,4 +9,5 @@ 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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from code.algorithms.search.ith_smallest import FindIthSmallest;
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from code.algorithms.search.ith_smallest_dc import FindIthSmallestDC;
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code/algorithms/search/ith_smallest.py
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65
code/algorithms/search/ith_smallest.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.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], i: int, **_):
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assert 1 <= i and i <= len(L), 'Der Wert von i muss zw. {lb} und {ub} liegen.'.format(lb = 1, ub = len(L));
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assert sorted(L) == sorted(list(set(L))), 'Ungültiger Input: L darf keine Duplikate enthalten!';
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return;
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def postChecks(L: List[int], i: int, value: int, **_):
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L_ = sorted(L);
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assert L_[i-1] == value, '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. kleinstes Element)', outputnames='value', checks=True, metrics=True, preChecks=preChecks, postChecks=postChecks)
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def FindIthSmallest(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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Annahmen:
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- L enthält keine Duplikate.
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- L enthält mindestens i Elemente.
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Outputs: Wert des i. kleinste Element in L.
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Beachte 1.kleinstes <==> Minimum.
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'''
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index = 0;
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minValue = L[0];
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AddToCounter(len(L));
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for i_ in range(1, len(L)):
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if L[i_] < minValue:
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index = i_;
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minValue = L[i_];
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if i == 1:
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logDebug('Das i. kleinste Element wurde gefunden.');
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return minValue;
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else:
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logDebug('Entfernte Minimum: {value}.'.format(value = minValue));
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i = i - 1;
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return FindIthSmallest(L=L[:index] + L[(index+1):], i=i);
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65
code/algorithms/search/ith_smallest_dc.py
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code/algorithms/search/ith_smallest_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.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], i: int, **_):
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assert 1 <= i and i <= len(L), 'Der Wert von i muss zw. {lb} und {ub} liegen.'.format(lb = 1, ub = len(L));
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assert sorted(L) == sorted(list(set(L))), 'Ungültiger Input: L darf keine Duplikate enthalten!';
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return;
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def postChecks(L: List[int], i: int, value: int, **_):
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L_ = sorted(L);
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assert L_[i-1] == value, '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. kleinstes Element, D & C)', outputnames='value', checks=True, metrics=True, preChecks=preChecks, postChecks=postChecks)
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def FindIthSmallestDC(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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Annahmen:
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- L enthält keine Duplikate.
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- L enthält mindestens i Elemente.
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Outputs: Wert des i. kleinste Element in L.
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Beachte 1.kleinstes <==> Minimum.
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'''
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AddToCounter();
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p = L[len(L)-1]; # NOTE: Pivotelement kann beliebig gewählt werden
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Ll = [ x for x in L if x < p ];
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Lr = [ x for x in L if x > p ];
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if len(Ll) == i - 1:
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logDebug('Es gibt genau i-1 Elemente vorm Pivotelment, p. Also ist p das i. kleinste Element.');
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return p;
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elif len(Ll) >= i:
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logDebug('Es gibt mindestens i Elemente vorm Pivotelement, p. Suche wird in linker Hälfte fortgesetzt.');
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return FindIthSmallestDC(L=Ll, i=i);
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else:
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i = i - (len(Ll) + 1)
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logDebug('Es gibt weniger als i-1 Elemente vorm Pivotelement, p. Suche wird in rechte Hälfte nach {i}. kleinstem Element fortgesetzt.'.format(i=i));
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return FindIthSmallestDC(L=Lr, i=i);
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@ -24,7 +24,7 @@ from code.algorithms.methods import *;
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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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assert L == sorted(list(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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@ -1,46 +0,0 @@
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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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@ -65,6 +65,10 @@ def LoopThroughCases(path: str):
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InterpolationSearch(L=inputs['L'], x=inputs['x'], u=0, v=len(inputs['L'])-1);
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elif command == 'algorithm-search-jump':
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JumpSearchLinear(L=inputs['L'], x=inputs['x'], m=inputs['m']);
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elif command == 'algorithm-search-ith-element':
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FindIthSmallest(L=inputs['L'], i=inputs['i']);
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elif command == 'algorithm-search-ith-element-dc':
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FindIthSmallestDC(L=inputs['L'], i=inputs['i']);
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else:
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raise ValueError('Command \033[1m{}\033[0m nicht erkannt'.format(command));
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except Exception as e:
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