#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  ;
  long long n, a, b, ans;
  string str;
  cin >> n >> a >> b;
  cin >> str;
  if (str[a - 1] == str[b - 1]) {
    cout << 0 << endl;
  } else {
    cout << 1 << endl;
  }
  return 0;
}
