题解

#include<iostream>
using namespace std;
int main(){
    string s;
    int x,y;
    cin>>s>>x>>y;
    if(s[x-1]==s[y-1]){
        s[x-1]='#';
        s[y-1]='#';
    }else{
        char c=s[x-1];
        s[x-1]=s[y-1];
        s[y-1]=c;
    }
    cout<<s;
    return 0;
}