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Cod sursa(job #203640)
#include<fstream>
using namespace std;
int a[1024], n;
int main(){
int i, nrtri=0;
ifstream f("nrtri.in");
f>>n;
for(i=1;i<=n;i++)
f>>a[i];
f.close();
int j, k;
for(i=1;i<=n;i++)
for(j=i+1;j<=n;j++)
for(k=j+1; k<=n; k++)
if(a[i]+a[j]>=a[k] && a[i]+a[k]>=a[j] && a[j]+a[k]>=a[i] )
nrtri++;
ofstream g("nrtri.out");
g<<nrtri<<'\n';
g.close();
return 0;
}