题解 | #称砝码#

import sys

n = int(input())
weight = list(map(int, input().split()))
num = list(map(int, input().split()))
if n == 1:
    print(num[0] + 1)
else:
    amout = []
    s = {0}
    for i in range(n):
        for j in range(num[i]):
            amout.append(weight[i])
    for i in amout:
        for j in list(s):
            s.add(i + j)
    print(len(s))

只能说大佬牛逼