#pragma GCC optimize("Ofast")
#include <bits/stdc++.h>
#ifdef local
#define safe cerr<<__PRETTY_FUNCTION__<<" line "<<__LINE__<<" safe\n"
#define pary(a...) danb(#a, a)
#define debug(a...) qqbx(#a, a)
template <typename ...T> void qqbx(const char *s, T ...a) {
int cnt = sizeof...(T);
((std::cerr << "\033[1;32m(" << s << ") = (") , ... , (std::cerr << a << (--cnt ? ", " : ")\033[0m\n")));
}
template <typename T> void danb(const char *s, T L, T R) {
std::cerr << "\033[1;32m[ " << s << " ] = [ ";
for (int f = 0; L != R; ++L)
std::cerr << (f++ ? ", " : "") << *L;
std::cerr << " ]\033[0m\n";
}
#else
#define debug(...) ((void)0)
#define safe ((void)0)
#define pary(...) ((void)0)
#endif // local
#define all(v) begin(v),end(v)
#define pb emplace_back
using namespace std;
using ll = long long;
using ld = long double;
template <typename T> using min_heap = priority_queue<T, vector<T>, greater<T>>;
const int mod = 1000000007;
const int inf = 1e9;
const ll INF = 1e18;
const int maxn = 100025;
int pa[maxn], sz[maxn];
int anc(int x) { return x==pa[x] ? x : pa[x]=anc(pa[x]); }
signed main() {
ios_base::sync_with_stdio(0), cin.tie(0);
int n, m;
cin >> n >> m;
for (int i = 0; i < n; i++) pa[i] = i, sz[i] = 1;
set<pair<int,int>> st;
while (m--) {
int a, b;
cin >> a >> b;
--a, --b;
a = anc(a), b = anc(b);
if (a != b) {
debug(st.count({a, b}));
if (st.count({ b, a })) {
pa[a] = b;
sz[b] += sz[a];
set<pair<int,int>> tmp;
for (auto [s, t]: st)
if (anc(s) != anc(t))
tmp.insert({ anc(s), anc(t) });
st = tmp;
} else {
st.insert({ a, b });
}
}
ll ans = 0;
for (auto [s, t]: st)
if (sz[t] != 1)
ans += 1LL * sz[s] * sz[t];
else
++ans;
for (int i = 0; i < n; i++) if (anc(i) == i)
ans += 1LL * sz[i] * (sz[i] - 1);
cout << ans << '\n';
// addEdge(anc(a), anc(b));
// out[a].emplace_back(b);
// in[b].emplace_back(a);
}
}
