n, m = gets.split(" ").map{|s| s.to_i}

d = Array.new(n) {Array.new(n, Float::INFINITY)}

m.times {
	a, b = gets.split(" ").map{|s| s.to_i-1}
	d[a][b] = d[b][a] = 1
}

0.upto(n-1) {|k|
	0.upto(n-1) {|i|
		0.upto(n-1) {|j|
			d[i][j] = [d[i][j], d[i][k] + d[k][j]].min
		}
	}
}

cnt = 0
0.upto(n-1) {|a|
	(a+1).upto(n-1) {|b|
		(b+1).upto(n-1) {|c|
			cnt += 1 if d[a][b] != 2 and d[a][c] != 2 and d[b][c] != 2 
		}
	}
}

puts cnt