743A - Vladik and flights - CodeForces Solution

#include <bits/stdc++.h>
#define ll long long
#define ui int 
#define ff first
#define ss second
#define pb push_back
#define mp  make_pair
#define pii pair<int,int>
#define vi  vector<int>
#define mii map<int,int>
#define w(x) int x; cin>>x; while(x--)
using namespace std;
int main(){
    int n,a,b;
    cin >> n >> a >> b;
    vector<char> i(n);
    for(int j = 0; j < n;j++){
      cin >> i[j];
    };
    char x = i[a - 1];
    if(i[a -1] != i[b-1]){
      cout << 1;
    }else{
      cout << 0;
    }
    return 0;
}