题解 | 支付宝消费打折
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https://www.nowcoder.com/practice/f8997c9b82714f058e12433a32614993
n,k = map(int,input().split())
g = list(map(int,input().split()))
z = str(input())
f = []
for i in range(n):
if z[i] == '1':
f.append(g[i]*0.95)
else:
f.append(g[i])
f.sort()
s = 0
for j in range(n):
s = s + f[j]
if s > k:
print(j)
break
if s <= k:
print(n)
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