题解 | #称砝码#
称砝码
https://www.nowcoder.com/practice/f9a4c19050fc477e9e27eb75f3bfd49c
kind = int(input())
ms = list(map(int, input().split()))
xs = list(map(int, input().split()))
dp = [{0} for _ in range(kind + 1)] # dp[i]表示第i种及其之前的重量和
for i in range(1, kind + 1):
for j in range(xs[i - 1] + 1):
for val in dp[i - 1]:
val = val + j * ms[i - 1]
dp[i].add(val)
print(len(dp[kind]))
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