#include <iostream>
#include <string>
#include <string.h>
#include <cstring>

using namespace std;

string s;
int a, b, n;
count;

int main() {
    cin >> n >> a >> b;
    cin >> s;
    if(s[a] == s[b]){
      cout << 0 << endl;
    }
    else{
      cout << 1 << endl;
    }
    return 0;
}