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Cod sursa(job #872702)
#include<iostream>
#include<fstream>
using namespace std;
int c[10000];
int main()
{
int n,i,k,j,d;
ifstream f("nrtri.in");
ofstream g("nrtri.out");
f>>n;
k=0;
for(i=1;i<=n;i++)
f>>c[i];
for(i=1;i<n-1;i++)
for(j=i+1;j<n;j++)
for(d=j+1;d<=n;d++)
if(c[i]+c[j]>=c[d]&&c[i]+c[d]>=c[j]&&c[j]+c[d]>=c[i]) k++;
g<<k;
}