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13 lines
420 B
Python
13 lines
420 B
Python
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from itertools import accumulate
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from bisect import bisect
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def fracKnapsack(vl, wt, W, n):
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r = list(sorted(zip(vl,wt), key=lambda x:x[0]/x[1],reverse=True))
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vl , wt = [i[0] for i in r],[i[1] for i in r]
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acc=list(accumulate(wt))
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k = bisect(acc,W)
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return 0 if k == 0 else sum(vl[:k])+(W-acc[k-1])*(vl[k])/(wt[k]) if k!=n else sum(vl[:k])
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print("%.0f"%fracKnapsack([60, 100, 120],[10, 20, 30],50,3))
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