#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
vector<int> depth, w;
vector<bool> visited, is_root;
vector<vector<int>> child, nchild;
int dfsc(int v, int r) {
int cnt = 1;
for (int u : child[v]) {
if (is_root[u])
nchild[r].push_back(u);
else
cnt += dfsc(u, r);
}
return cnt;
}
int dfs1(int v, int p, vector<vector<int>> &G, int d = 0) {
visited[v] = true;
depth[v] = d;
int low = d;
for (int u : G[v]) {
if (visited[u]) {
if (u != p)
low = min(low, depth[u]);
continue;
}
child[v].push_back(u);
int curr = dfs1(u, v, G, d + 1);
if (curr > d) {
w[u] = dfsc(u, u);
is_root[u] = true;
}
low = min(low, curr);
}
return low;
}
ll ans = 0;
int dfs2(int v, int n) {
vector<int> S;
int siz = w[v];
for (int u : nchild[v]) {
S.push_back(dfs2(u, n));
siz += S.back();
}
int curr = n - siz;
for (int s : S) {
ans += curr * s * w[v];
curr += s;
}
return siz;
}
int main() {
cin.tie(nullptr)->sync_with_stdio(false);
int n, m;
cin >> n >> m;
vector<vector<int>> G(n + 1);
for (int i = 0; i < m; i++) {
int u, v;
cin >> u >> v;
G[u].push_back(v);
G[v].push_back(u);
}
visited.resize(n + 1);
depth.resize(n + 1);
child.resize(n + 1);
nchild.resize(n + 1);
w.resize(n + 1);
is_root.resize(n + 1);
for (int i = 1; i <= n; i++) {
if (visited[i])
continue;
dfs1(i, 0, G);
w[i] = dfsc(i, i);
dfs2(i, n);
}
cout << 2 * ans << '\n';
}
/*
7 6
1 2
2 3
2 4
2 5
5 6
5 7
*/
