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Cod sursa(job #766087)
#include <fstream>
using namespace std;
ifstream fin ("nrtri.in");
ofstream fout ("nrtri.out");
//int verif ( int [],int,int,int);
int main()
{
int n,j,k,i,v[800],nr=0;;
fin>>n;
for(i=0;i<n;i++)
fin>>v[i];
for(i=0;i<n-2;i++)
for(j=i+1;j<n-1;j++)
for(k=j+1;k<n;k++)
if ( ( v[i]+v[j]>=v[k] )&& (v[i]+v[k]>=v[j] )&&( v[j]+v[k]>=v[i] ) )
nr++;
fout<<nr;
fin.close();
fout.close();
return 0;
}
/*
int verif( int v[800],int i, int j ,int k)
{
if( ( v[i]+v[j]>=v[k] )&& (v[i]+v[k]>=v[j] )&&( v[j]+v[k]>=v[i] ) )
return 1;
return 0;
}
*/