我好像要变成笨小猴啦

#include<iostream>
#include<cstring>
#include<map>
using namespace std;
char s[101];
int maxx,minn=99999;
map<char,int>a;
int f(int x)
{
    if(x<2)
    return 0;
    int i=2;
    while(x%i)
    i++;
    if(i<x)
    return 0;
    return 1;
}
int main()
{
    cin>>s;
    for(int i=0;i<strlen(s);i++)
    {
        a[s[i]]++;
        if(a[s[i]]>maxx)
        maxx=a[s[i]];
        if(a[s[i]]<minn)
        minn=a[s[i]];
    }
    if(f(maxx-minn))
    cout<<"Lucky Word\n"<<maxx-minn;
    else
    cout<<"No Answer\n0";
}