#include <stdio.h>
#define N 4300
unsigned int n,m,a[N][N/32+1];
unsigned int minim (int a, int b)
{
	if (a>b)
		return b;
	return a;
}
void citirith()
{
	unsigned int x,y,s;
	scanf("%u%u",&n,&m);
	for (int i=1; i<=m; i++)
	{
		scanf("%u%u",&x,&y);
		--x;--y;
		s=x+y;
		x=minim(x,y); y=s-x;
		a[x][y>>5]|=1<<(y&31);
	}
}
/*
void afisarith()
{
	for (int i=1; i<=n; i++)
		printf("%d\n",a[i][
*/
void rezolvarith()
{
	unsigned int sol,z,cat,check,xz0r;
	long long solmax=0;
	for (int i=0; i<n-1; i++)
		for (int j=i+1; j<n; j++)
		{
			
			check=j/32;
			if (!(a[i][check]&(1<<(j&31))))
				continue;
			sol=0;
			for (int k=0; k<=n/32; k++)
			{
				z=a[i][k]&a[j][k];
				cat=0;
				while (z)
				{
					if (z%2)
						++cat;
					z/=2;
				}
				sol+=cat;
			}
			solmax+=(long long)sol;
		}
	printf("%lld\n",solmax);
}
int main()
{
	freopen("triplete.in","r",stdin);
	freopen("triplete.out","w",stdout);
	citirith();
	rezolvarith();
	return 0;
}