Загрузка данных


#include <iostream>
#include <vector>
using namespace std;

vector<int> parent;

int findRoot(int x) 
{
    while (parent[x] != x) 
    {
        parent[x] = parent[parent[x]];
        x = parent[x];
    }
    return x;
}

int main() 
{
    int n, m;
    cin >> n >> m;

    parent.resize(n + 1);
    for (int v = 1; v <= n; v++) parent[v] = v;

    vector<int> a(m), b(m);
    for (int i = 0; i < m; i++) 
    {
        cin >> a[i] >> b[i];
        int ra = findRoot(a[i]), rb = findRoot(b[i]);
        if (ra != rb) parent[ra] = rb;
    }

    vector<int> verts(n + 1, 0), edges(n + 1, 0);
    
    for (int v = 1; v <= n; v++) verts[findRoot(v)]++;
    for (int i = 0; i < m; i++) edges[findRoot(a[i])]++;

    int components = 0
    int trees = 0;

    for (int v = 1; v <= n; v++) 
    {
        if (findRoot(v) == v) 
        {
            components++;
            if (edges[v] == verts[v] - 1) trees++;
        }
    }

    cout << components << " " << trees;
    return 0;
}