#include<bits/stdc++.h>
using namespace std;

#define ll long long
#define nl "\n"

void files(){
    ios_base::sync_with_stdio(false),cin.tie(NULL),cout.tie(NULL);
    #ifndef ONLINE_JUDGE
        freopen("input.txt", "r", stdin), freopen("output.txt", "w", stdout);
    #endif
}


void solve(){
    int n,m; cin>>n>>m;
    vector<vector<int>>adj(n+1);
    for(int i=0; i<m; i++){
        int u,v; cin>>u>>v;
        adj[u].push_back(v);
        adj[v].push_back(u);
    }


    vector<bool>vis(n+1, false);
    ll ans = 0;
    for(int i=1;i<=n;i++){
        if(vis[i]) continue;
        queue<int>q;
        q.push(i);
        vis[i] = true;
        ll total = 0;
        while(!q.empty()){
            ll sz = q.size();
            ans += max(0LL,(total-1))*sz;
            ans += sz*(sz-1)/2;
            total += sz;
            while(sz--){
                int node = q.front();
                q.pop();
                for(auto& child: adj[node]){
                    if(!vis[child]){
                        vis[child] = true;
                        q.push(child);
                    }
                }
            }
        }

    }

    cout<<ans<<nl;

}

int main(){
    files();
    int t = 1;
    // cin>>t;
    while(t--) solve();

    return 0;
}