求救！！！

#include<iostream>
#include<cstdio>
#include<cstring>
#define N 10000
#define LL long long
using namespace std;
int n,m,len1,len2,ans;
LL ha1[N],ha2[N],u,v;
char s1[N],s2[N];
int main(){
    scanf("%s%s",s1,s2);len1=strlen(s1);len2=strlen(s2);
    for(int i=1;i<=len1;i++)ha1[i]=(s1[i-1]&63&31)+(ha1[i-1]*32);
    for(int i=1;i<=len2;i++)ha2[i]=(s2[i-1]&63&31)+(ha2[i-1]*32);
    for(int i=1;i<=len1;i++) if(ha1[i]==ha2[len2]) ans=i;
    printf("%d\n",ans);
}