#include<stdio.h>
#define input "triplete.in"
#define output "triplete.out"
#define NMAX 5001

bool a[NMAX][NMAX];
int n,m,c;

void open()
{
	freopen(input,"r",stdin);
	freopen(output,"w",stdout);
}

void read()
{
	int x,y;
	scanf("%d%d",&n,&m);
	for(int i=1;i<=m;i++)
	{
		scanf("%d%d",&x,&y);
		a[x][y]=true;
	}
}

void count()
{
	for(int i=1;i<=n;i++)
		for(int j=1;j<=n;j++)
			if(a[i][j])
				for(int k=j+1;k<=n;k++)
					if(a[i][k])
						if(a[j][k])
							c++;
}

void a_fish()
{
	printf("%d\n",c);
}

int main()
{
	open();
	read();
	count();
	a_fish();
	return 0;
}