50分求助大佬

#include<bits/stdc++.h>
using namespace std;
char s[110];
const int zhi[25]={2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97};
int sum[26];
int main(){
    int maxn=0,minn=110;
    scanf("%s",s);
    int len=strlen(s);
    for(int i=0;i<len;i++){
        sum[s[i]-'a']++;
    }
    for(int i=0;i<26;i++){
        if(sum[i]>maxn) maxn=sum[i];
        if(sum[i]>0&&sum[i]<minn) minn=sum[i];
    }
    for(int i=0;i<25;i++){
        if(maxn-minn==zhi[i]){
            cout<<"Lucky Word"<<endl<<maxn-minn;
            return 0;
        }
    }
    cout<<"No Answer"<<endl;
    return 0;
}