速解

#include<bits/stdc++.h>
using namespace std;
string word;
short data[24];
bool isprime(int x){
if(x<2) return 0;
for(int i=2;i<x;i++){
if(x%i==0) return 0;
}
return 1;
}
int main(){
cin>>word;
int len=word.size(),max=0,min=102;
for(int i=0;i<len;i++){
data[word[i]-'a'];
}
for(int i=0;i<24;i){
if(data[i]==0) continue;
if(data[i]>max) max=data[i];
if(data[i]<min) min=data[i];
}

if(isprime(max-min)){
    cout<<"Lucky Word"<<endl;
    cout<<max-min;
}else{
    cout<<"No Answer"<<endl;
    cout<<0;
}
return 0;

}