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Create FractionalKnapsack.py (#438)

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Srikumar Sastry 2018-10-19 18:51:40 +05:30 committed by Harshil
parent 81dc87aeb1
commit 94324e91b4
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dynamic_programming/FractionalKnapsack.py Normal file
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from itertools import accumulate
from bisect import bisect
def fracKnapsack(vl, wt, W, n):
r = list(sorted(zip(vl,wt), key=lambda x:x[0]/x[1],reverse=True))
vl , wt = [i[0] for i in r],[i[1] for i in r]
acc=list(accumulate(wt))
k = bisect(acc,W)
return 0 if k == 0 else sum(vl[:k])+(W-acc[k-1])*(vl[k])/(wt[k]) if k!=n else sum(vl[:k])
print("%.0f"%fracKnapsack([60, 100, 120],[10, 20, 30],50,3))