#include 
#include 
#include 
using namespace std;
const int maxn = 1e5 + 10;
vector graph[maxn];
bool visited[maxn];
int size_of_island;
void dfs(int node) {
    visited[node] = true;
    size_of_island++;
    for(int i = 0; i < (int) graph[node].size(); i++) {
        int neighbour = graph[node][i];
        if(!visited[neighbour]) {
            dfs(neighbour);
        }
    }
}
int main() {
    ios_base::sync_with_stdio(false);
    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);
    }
    for(int i = 0; i < n; i++) {
        visited[i] = false;
    }
    long long res = 0;
    for(int i = 0; i < n; i++) {
        if(!visited[i]) {
            size_of_island = 0;
            dfs(i);
            res += size_of_island * (n - size_of_island);
        }
    }
    cout << res / 2 << endl;
    
    return 0;
}