import java.util.*;

public class Main {
    static long ans   = 0;
    static int n;
    static ArrayList<ArrayList<Integer>> graph = new ArrayList<>();
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        n = sc.nextInt();
        for (int i = 0; i < n; i++) {
            graph.add(new ArrayList<>());
        }
        for (int i = 0; i < n - 1; i++) {
            int a = sc.nextInt() - 1;
            int b = sc.nextInt() - 1;
            graph.get(a).add(b);
            graph.get(b).add(a);
        }
        getChild(0, 0);
        ans += (long)n * n;
        System.out.println(ans);
    }
    
    static int getChild(int idx, int parent) {
        int count = 1;
        for (int x : graph.get(idx)) {
            if (x == parent) {
                continue;
            }
            int child = getChild(x, idx);
            count += child;
            ans += (long)child * (n - child);
        }
        ans += (long)(n - count) * count;
        return count;
    }
}