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Cod sursa(job #802313)
#include <fstream>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <iostream>
using namespace std;
int main()
{
ifstream f("nrtri.in");
ofstream g("nrtri.out");
long int i, j, k, mij, nr=0, n, v[1000];;
//Read
f>>n;
for(i=1; i<=n; i++)
f>>v[i];
//Compute
for (i=1;i<n;i++)
for (j=i+1;j<=n;j++)
if (v[i]>v[j])
{
mij=v[i];
v[i]=v[j];
v[j]=mij;
}
for(i=1 ;i<n; i++)
for(j=i+1; j<n; j++)
for(k=j+1; k<=n; k++)
if(v[i]+v[j] >= v[k])
nr++;
else
break;
//Print
g<<nr;
}