题解 | 称砝码

import sys

n= int(input())
lm= list(map(int,input().split()))
lx = list(map(int,input().split()))

#一个个算重量
def quan(n,lm,lx):
    weigh={0}
    for i in range(n):
       weii = lm[i]
       mount = lx[i]
       currentweight = list(weigh)
       for j in currentweight:
        for k in range(1,mount+1):
            newweight = j+ weii * k
            weigh.add(newweight)
    return len(weigh)
    
print(quan(n,lm,lx))