Create FractionalKnapsack.py (TheAlgorithms#438)

Author: Vishu26

dynamic_programming/FractionalKnapsack.py

@@ -0,0 +1,12 @@
+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))