#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, pos, l, r;
  cin >> n >> pos >> l >> r;
  int result;
  if (l == 1 && r == n) {
    result = 0;
  } else if (l == 1) {
    result = abs(pos - r) + 1;
  } else if (r == n) {
    result = abs(pos - l) + 1;
  } else {
    result = min(abs(pos - l), abs(pos - r)) + r - l + 2;
  }
  cout << result << endl;
}
