```
for (int i=0;i<lena;i++)
```
你可以想想
字符串是从0开始的
如果他说n长度那结尾应该是n-1
n-1-0+1=n
by ajahjahah @ 2022-04-17 13:56:50
@[Expectation](/user/706255)
[The AC code](https://www.luogu.com.cn/record/74111013)
```
#include<cstdio>
#include<cstring>
#include<iostream>
using namespace std;
char a[11],b[11];
int main()
{
int suma=1,sumb=1;
cin.getline(a,11);
cin.getline(b,11);
int lena=strlen(a);
int lenb=strlen(b);
for (int i=0;i<lena;i++)
{
suma*=(a[i]-64);
}
for (int i=0;i<lenb;i++)
{
sumb*=(b[i]-64);
}
if (suma%47==sumb%47)
{
printf("GO");
}
else
{
printf("STAY");
}
return 0;
}
```
原因：字符串下标从$0$开始。
上楼更加详细，听上楼的（帮忙@下
by coldy_rainy @ 2022-04-17 14:21:48
@[lao_ba](/user/357378)
谢谢
by Expectation @ 2022-04-17 14:48:57
@[penhaochen](/user/526755) 谢谢
by Expectation @ 2022-04-17 14:49:19