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#include <iostream>
#include <vector>
#include <queue>
#include <algorithm>
#include <cstring>
#include <set>
#include <map>
using namespace std;
using namespace std;
vector<int>graph[100005];
int main() {

int n, m;
cin>>n>>m;

for(int i=0; i<m; i++){
    int a, b;
    cin>>a>>b;
    graph[a].push_back(b);
    graph[b].push_back(a);
    }

bool visited[n];
memset(visited, false, sizeof visited);
queue<int>q;

long long result=0;

for(int j=0; j<n; j++){
        int counter=0;
        
        if(visited[j]!=true){
            q.push(j);
            visited[j] = true;
            
            
            
            while(!q.empty()){
                int cs=q.front();
                q.pop();
                
                
                
                for(int i=0; i<graph[cs].size(); i++){
                    if(visited[graph[cs][i]]==false){
                        q.push(graph[cs][i]);
                        
                        visited[graph[cs][i]]=true;
                    }
                    
                    
                }
                counter++;
                
            }
//            cout << counter << endl;
            result += counter * (n - counter);
        }
    }

cout<<result / 2;

return 0;
}