#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  long long int test = 1;
  for (; test > 0; --test) {
    long long int n, a, b, c, d, c1 = 1, c2, c3, c4;
    cin >> n >> a >> b >> c >> d;
    c2 = c1 + b - c;
    c3 = c2 + a - d;
    c4 = c3 + c - b;
    long long int m = 1 - min(min(c1, c2), min(c3, c4)),
                  m1 = max(max(c1, c2), max(c3, c4));
    if (m1 + abs(m) > n)
      cout << 0 << endl;
    else
      cout << (n - (m1 + abs(m)) + 1) * n << endl;
  }
  return (0);
}
