#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, pos, lo, hi;
  while (cin >> n >> pos >> lo >> hi) {
    int cnt = 0;
    if (lo == 1 && hi == n) {
      cout << '0' << endl;
      continue;
    }
    int xlo = abs(pos - lo);
    int xhi = abs(pos - hi);
    if (lo - 1 >= 1 && hi + 1 <= n) {
      cnt += 2;
      if (xlo < xhi) {
        cnt += xlo;
      } else
        cnt += xhi;
      cnt += hi - lo;
    } else if (lo - 1 >= 1) {
      cnt += xlo;
      cnt++;
    } else {
      cnt += xhi;
      cnt++;
    }
    cout << cnt << endl;
  }
  return 0;
}
