#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
typedef double db;
typedef string str;
typedef pair<int,int> pi;
typedef pair<ll,ll> pl;
typedef pair<db,db> pd;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef vector<db> vd;
typedef vector<str> vs;
typedef vector<pi> vpi;
typedef vector<pl> vpl;
typedef vector<pd> vpd;
#define mp make_pair
#define f first
#define s second
#define sz(x) (int)x.size()
#define all(x) begin(x), end(x)
#define rall(x) (x).rbegin(), (x).rend()
#define rsz resize
#define ins insert
#define ft front()
#define bk back()
#define pf push_front
#define pb push_back
#define eb emplace_back
#define lb lower_bound
#define ub upper_bound
#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i)
#define R0F(i,a) ROF(i,0,a)
#define trav(a,x) for (auto& a: x)
const int MOD = 1e9+7; // 998244353;
const int MX = 2e5+5;
const ll INF = 1e18;
const ld PI = acos((ld)-1);
const int xd[4] = {1,0,-1,0}, yd[4] = {0,1,0,-1};
mt19937 rng((uint32_t)chrono::steady_clock::now().time_since_epoch().count());
template<class T> bool ckmin(T& a, const T& b) {
return b < a ? a = b, 1 : 0; }
template<class T> bool ckmax(T& a, const T& b) {
return a < b ? a = b, 1 : 0; }
int pct(int x) { return __builtin_popcount(x); }
int bits(int x) { return 31-__builtin_clz(x); } // floor(log2(x))
int cdiv(int a, int b) { return a/b+!(a<0||a%b == 0); } // division of a by b rounded up, assumes b > 0
int fstTrue(function<bool(int)> f, int lo, int hi) {
hi ++; assert(lo <= hi); // assuming f is increasing
while (lo < hi) { // find first index such that f is true
int mid = (lo+hi)/2;
f(mid) ? hi = mid : lo = mid+1;
}
return lo;
}
// INPUT
template<class A> void re(complex<A>& c);
template<class A, class B> void re(pair<A,B>& p);
template<class A> void re(vector<A>& v);
template<class A, size_t SZ> void re(array<A,SZ>& a);
template<class T> void re(T& x) { cin >> x; }
void re(db& d) { str t; re(t); d = stod(t); }
void re(ld& d) { str t; re(t); d = stold(t); }
template<class H, class... T> void re(H& h, T&... t) { re(h); re(t...); }
template<class A> void re(complex<A>& c) { A a,b; re(a,b); c = {a,b}; }
template<class A, class B> void re(pair<A,B>& p) { re(p.f,p.s); }
template<class A> void re(vector<A>& x) { trav(a,x) re(a); }
template<class A, size_t SZ> void re(array<A,SZ>& x) { trav(a,x) re(a); }
// TO_STRING
#define ts to_string
str ts(char c) { return str(1,c); }
str ts(bool b) { return b ? "true" : "false"; }
str ts(const char* s) { return (str)s; }
str ts(str s) { return s; }
template<class A> str ts(complex<A> c) {
stringstream ss; ss << c; return ss.str(); }
str ts(vector<bool> v) {
str res = "{"; F0R(i,sz(v)) res += char('0'+v[i]);
res += "}"; return res; }
template<size_t SZ> str ts(bitset<SZ> b) {
str res = ""; F0R(i,SZ) res += char('0'+b[i]);
return res; }
template<class A, class B> str ts(pair<A,B> p);
template<class T> str ts(T v) { // containers with begin(), end()
bool fst = 1; str res = "{";
for (const auto& x: v) {
if (!fst) res += ", ";
fst = 0; res += ts(x);
}
res += "}"; return res;
}
template<class A, class B> str ts(pair<A,B> p) {
return "("+ts(p.f)+", "+ts(p.s)+")"; }
// OUTPUT
template<class A> void pr(A x) { cout << ts(x); }
template<class H, class... T> void pr(const H& h, const T&... t) {
pr(h); pr(t...); }
void ps() { pr("\n"); } // print w/ spaces
template<class H, class... T> void ps(const H& h, const T&... t) {
pr(h); if (sizeof...(t)) pr(" "); ps(t...); }
// DEBUG
void DBG() { cerr << "]" << endl; }
template<class H, class... T> void DBG(H h, T... t) {
cerr << ts(h); if (sizeof...(t)) cerr << ", ";
DBG(t...); }
#ifdef LOCAL // compile with -DLOCAL
#define dbg(...) cerr << "LINE(" << __LINE__ << ") -> [" << #__VA_ARGS__ << "]: [", DBG(__VA_ARGS__)
#else
#define dbg(...) 0
#endif
// FILE I/O
void setIn(string s) { freopen(s.c_str(),"r",stdin); }
void setOut(string s) { freopen(s.c_str(),"w",stdout); }
void unsyncIO() { ios_base::sync_with_stdio(0); cin.tie(0); }
void setIO(string s = "") {
unsyncIO();
// cin.exceptions(cin.failbit);
// throws exception when do smth illegal
// ex. try to read letter into int
if (sz(s)) { setIn(s+".in"), setOut(s+".out"); } // for USACO
}
const int mx = 100005;
int n;
vi oadj[mx];
bool ovisited[mx];
vi olist;
void ogenList(int node){
if(ovisited[node]) return;
//dbg(node);
ovisited[node] = 1;
olist.pb(node);
for(auto u: oadj[node]){
ogenList(u);
}
}
vi adj[mx];
int sub[mx];
void genSubs(int node, int prv = -1){
sub[node] = 1;
for(auto u: adj[node]){
if(u == prv) continue;
genSubs(u, node);
sub[node]+=sub[u];
}
}
ll treeSolve(int N){
genSubs(1);
ll ans = 0;
for(int i = 1; i <= N; i++){
ans+=ll(N-1)*ll(N-1);
for(auto u: adj[i]){
if(sub[u] > sub[i]){
ans-=(ll(N)-ll(sub[i]))*(ll(N)-ll(sub[i]));
}
else{
ans-=ll(sub[u])*ll(sub[u]);
}
}
}
return ans;
}
ll cycSolve(int N){
return ll(N)*ll(N-1)*ll(N-2);
}
int num[mx];
int par[mx];
vi children[mx];
bool visited[mx];
void dfs(int node, int prv = -1){
visited[node] = 1;
if(prv != -1){
par[node] = prv;
children[prv].pb(node);
}
for(auto u: adj[node]){
if(u == prv) continue;
if(visited[u]){
if(num[u] == 1) continue;
num[node]++;
num[u]--;
// dbg(node, u);
continue;
}
dfs(u, node);
}
}
void getnum(int node){
for(auto u: children[node]){
getnum(u);
num[node]+=num[u];
}
}
int cnt = 0;
map<int, int> m;
int csz[mx];
void genMap(int node){
if(num[node] > 0){
assert(num[node] == 1); //cactus
m[node] = m[par[node]];
csz[m[node]]++;
}
else{
m[node] = ++cnt;
csz[m[node]]++;
}
for(auto u: children[node]){
genMap(u);
}
}
vi tadj[mx];
int tsub[mx];
void genTsub(int node, int prv = -1){
tsub[node]+=csz[node];
for(auto u: tadj[node]){
if(u == prv) continue;
genTsub(u, node);
tsub[node]+=tsub[u];
}
}
ll tsolve(int N){
genTsub(1);
// for(int i = 1; i <= cnt; i++){
// dbg(i, tsub[i]);
// }
ll ans = 0;
for(int i = 1; i <= cnt; i++){
ans+=ll(csz[i])*ll(N-1)*ll(N-2);
for(auto u: tadj[i]){
if(tsub[u] > tsub[i]){
ans-=ll(N-tsub[i])*ll(N-tsub[i]-1);
ans-=ll(csz[i]-1)*ll(N-tsub[i]+1)*ll(N-tsub[i]);
}
else{
ans-=ll(tsub[u])*ll(tsub[u]-1);
ans-=ll(csz[i]-1)*ll(tsub[u]+1)*ll(tsub[u]);
}
}
//dbg(i, ans);
}
return ans;
}
ll hardSolve(int N){ //CHANGE THIS! Do Cactus case as well
cnt = 0;
for(int i = 1; i <= N; i++){
num[i] = par[i] = csz[i] = tsub[i] = 0;
visited[i] = 0;
children[i].clear();
tadj[i].clear();
}
m.clear();
dfs(1);
// for(int i = 1; i <= N; i++){
// dbg(i, children[i]);
// }
// for(int i = 1; i <= N; i++){
// dbg(i, num[i]);
// }
getnum(1);
// for(int i = 1; i <= N; i++){
// dbg(i, num[i]);
// }
genMap(1);
// dbg(m);
// for(int i = 1; i <= N; i++){
// dbg(i, csz[i]);
// }
for(int i = 1; i <= N; i++){
for(auto u: adj[i]){
if(m[i] != m[u]){
tadj[m[i]].pb(m[u]);
}
}
}
// dbg(cnt);
// for(int i = 1; i <= cnt; i++){
// dbg(tadj[i]);
// }
return tsolve(N);
}
ll solve(int N){
bool isTree = 1;
bool isCyc = 1;
int tot = 0;
for(int i = 1; i <= N; i++){
tot+=sz(adj[i]);
if(sz(adj[i]) > 2) isCyc = 0;
}
if(tot/2 != N-1){
isTree = 0;
}
// if(isTree){
// //dbg(hardSolve(N));
// //assert(hardSolve(N) == treeSolve(N));
// return treeSolve(N);
// }
// else if(isCyc){
// return cycSolve(N);
// }
return hardSolve(N);
}
int main() {
setIO();
int m;
cin >> n >> m;
for(int i = 1; i <= m; i++){
int u, v;
cin >> u >> v;
oadj[u].pb(v);
oadj[v].pb(u);
}
ll ans = 0;
for(int i = 1; i <= n; i++){
if(ovisited[i]) continue;
//dbg(i);
olist.clear();
ogenList(i);
map<int, int> m;
for(int i = 0; i < sz(olist); i++){
m[olist[i]] = i+1;
}
int N = sz(olist);
for(int i = 1; i <= N; i++){
adj[i].clear();
}
for(auto u: olist){
for(auto x: oadj[u]){
adj[m[u]].pb(m[x]);
}
}
ans+=solve(N);
}
ps(ans);
// you should actually read the stuff at the bottom
}
/* stuff you should look for
* int overflow, array bounds
* special cases (n=1?)
* do smth instead of nothing and stay organized
* WRITE STUFF DOWN
*/
