triangle.cpp

#include <bits/stdc++.h>
using namespace std;

signed main() {
  cin.tie(0)->sync_with_stdio(0);
  vector<int> a(5);
  for (int i = 0; i < 5; i++) {
    cin >> a[i];
  }
  int ans = 0;
  for (int i = 0; i + 2 < 5; i++)
  for (int j = i + 1; j + 1 < 5; j++)
  for (int k = j + 1; k < 5; k++) {
    if (a[i] + a[j] > a[k] && a[i] + a[k] > a[j] && a[j] + a[k] > a[i]) {
      ans++;
    }
  }
  cout << ans << '\n';
}