Cod sursa(job #2623435)
Utilizator | Theodor Moroianu theodor.moroianu | Data | 3 iunie 2020 10:35:39 |
---|---|---|---|
Problema | Numarare triunghiuri | Scor | 75 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva de probleme | Marime | 0.46 kb |
#include <bits/stdc++.h>
using namespace std;
int main()
{
ifstream in("nrtri.in");
ofstream out("nrtri.out");
int n;
in >> n;
vector <int> v(n);
for (auto & i : v)
in >> i;
sort(v.begin(), v.end());
int ans = 0;
for (int i = 0; i < (int)v.size(); i++)
for (int j = 0; j < i; j++)
for (int k = 0; k < j; k++)
ans += (v[j] + v[k] >= v[i]);
out << ans << '\n';
return 0;
}