K = [[0 for x in range(W+1)] for x in range(n+1)]

# Build table K[][] in bottom up manner

for i in range(n+1):

for w in range(W+1):

if i==0 or w==0:

K[i][w] = 0

elif wt[i-1] <= w:

K[i][w] = max(val[i-1] + K[i-1][w-wt[i-1]], K[i-1][w])

else:

K[i][w] = K[i-1][w]