Cod sursa(job #355564)
Utilizator | Bratu Dalia daliutzza | Data | 11 octombrie 2009 16:51:58 |
---|---|---|---|
Problema | Numarare triunghiuri | Scor | 70 |
Compilator | cpp | Status | done |
Runda | CNRV #2 | Marime | 0.37 kb |
#include<fstream.h>
int main()
{unsigned v[801], n, a, i, j, k;
ifstream f("nrtri.in");
ofstream g("nrtri.out");
f>>n;
a=0;
for (i=1; i<=n; i++) f>>v[i];
if (n<3) g<<0;
else
{for (i=1; 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]) a++;
g<<a;
}
f.close();
g.close();
return 0;
}