Cod sursa(job #2803224)
Utilizator | Data | 19 noiembrie 2021 17:40:01 | |
---|---|---|---|
Problema | Numarare triunghiuri | Scor | 95 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva de probleme | Marime | 0.6 kb |
#include <iostream>
#include <fstream>
#include <algorithm>
using namespace std;
ifstream in("nrtri.in");
ofstream out("nrtri.out");
int main()
{
int n;
in>>n;
int v[n+1];
for(int i=1; i<=n; i++)
in>>v[i];
sort(v+1,v+n+1);
int nr=0;
for(int i=1; i<=n-2; i++)
{
for(int j=i+1; j<=n-1; j++)
{
int poz=j+1;
int cnt=0;
while(v[poz]<=v[i]+v[j] && poz<=n)
{
poz++;
cnt++;
}
nr=nr+cnt;
}
}
out<<nr;
return 0;
}