Cod sursa(job #906745)
Utilizator | Data | 7 martie 2013 08:12:12 | |
---|---|---|---|
Problema | Numarare triunghiuri | Scor | 0 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.48 kb |
#include<cstdio>
int n;
int x[801];
long nr = 0;
int main()
{
FILE*f;
f = fopen("nrtri.in","r");
fscanf(f,"%d",&n);
for (int i=1;i<=n;i++)
fscanf(f,"%d",&x[i]);
fclose(f);
for (int i=1;i<=(n-2);i++)
for (int j=2;j<=(n-1);j++)
for (int k=3;k<=n;k++)
if ( (i!=j) && (j!=k) )
if ( ((x[i]+x[j])>=x[k]) && ((x[j]+x[k])>=x[i]) && ((x[i]+x[k])>=x[j]) ) { nr++; }
f = fopen("nrtri.out","w");
fprintf(f,"%ld",nr);
fclose(f);
return 0;
}