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Cod sursa(job #21943)
#include<fstream.h>
int n,m,a[200][200];
main() {
ifstream f("triplete.in");
ofstream g("triplete.out");
int i,j,k,c=0;
f>>n>>m;
for(i=1;i<=n;i++)
for(j=1;j<=n;j++)
a[i][j]=0;
while(f>>i>>j) a[i][j]=a[j][i]=1;
for(i=1;i<n-1;i++)
for(j=i+1;j<n;j++)
for(k=j+1;k<=n;k++)
if(a[i][j] && a[j][k] && a[k][i])
c++;// cout<<i<<" "<<j<<" "<<k<<endl;
g<<c;
return 0;
}