#include <iostream>
#include <algorithm>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <numeric>
#include <bitset>
#include <cmath>

static const int MOD = 1000000007;
using ll = long long;
using u32 = unsigned;
using u64 = unsigned long long;
using namespace std;

template<class T> constexpr T INF = ::numeric_limits<T>::max() / 32 * 15 + 208;

int main() {
    int n, m;
    cin >> n >> m;
    vector<vector<int>> d(n, vector<int>(n, INF<int>));
    for (int i = 0; i < n; ++i) {
        d[i][i] = 0;
    }
    for (int i = 0; i < m; ++i) {
        int a, b;
        scanf("%d %d", &a, &b);
        a--; b--;
        d[a][b] = d[b][a] = 1;
    }
    for (int k = 0; k < n; ++k) {
        for (int i = 0; i < n; ++i) {
            for (int j = 0; j < n; ++j) {
                d[i][j] = min(d[i][j], d[i][k]+d[k][j]);
            }
        }
    }
    int ans = 0;
    for (int i = 0; i < n; ++i) {
        for (int j = i+1; j < n; ++j) {
            for (int k = j+1; k < n; ++k) {
                ans += (d[i][j] != 2 && d[i][k] != 2 && d[j][k] != 2);
            }
        }
    }
    cout << ans << "\n";
    return 0;
}