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Cod sursa(job #534216)
#include<iostream>
#include<fstream>
using namespace std;
int main()
{
int n,v[801],i,j,k,q=0,t;
ifstream f("nrtri.in");
ofstream g("nrtri.out");
f>>n;
for(i=1;i<=n;i++)
f>>v[i];
for(i=1;i<n;i++)
for(j=i+1;j<=n;j++)
if(v[i]>v[j])
{
t=v[i];
v[i]=v[j];
v[j]=t;
}
for(i=1;i<n-1;i++)
for(j=i+1;j<n;j++)
for(k=j+1;k<=n&&v[i]+v[j]>=v[k];k++)
q++;
g<<q;
f.close();
g.close();
return 0;
}