Cod sursa(job #20256)
Utilizator | Data | 20 februarie 2007 21:42:00 | |
---|---|---|---|
Problema | Triplete | Scor | 0 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.46 kb |
#include<fstream.h>
#define dim 4097
int a[dim][dim];
int main()
{ifstream f("triplete.in");
ofstream g("triplete.out");
unsigned long sum=0,n,m,i,j,x,y,k;
f>>n>>m;
for(i=1;i<=m;i++)
{f>>x>>y;
a[x][y]=a[y][x]=1;
}
f.close();
for(i=1;i<=n;i++)
{for(j=i+1;j<=n;j++)
if(a[i][j]==1)
{k=i+1;
while(k<j)
{while((a[k][j]==0)&&(k<j)) k++;
if(k<j) if(a[k][i]==1) sum++;
k++;
}
}
}
g<<sum<<'\n';g.close();
return 0;
}