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

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    int n, m;
    cin >> n >> m;
    vector<vector<int>> g(n);
    vector<pair<int,int>> ans;
    for(int i = 0; i < m; i++){
        int u, v;
        cin >> u >> v;
        g[--u].emplace_back(--v);
    }
    vector<int> idx(n), visited(n);
    auto dfs = [&](auto dfs, int v) -> int {
        if(idx[v] == g[v].size()) return -1;
        if(visited[v]) return v;
        visited[v] = true;
        for(int &j = idx[v]; j < g[v].size(); ){
            int u = g[v][j++];
            int res = dfs(dfs, u);
            if(res != -1){
                if(res != v){
                    visited[v] = false;
                    return res;
                }
            }else{
                ans.emplace_back(v + 1, u + 1);
            }
        }
        return -1;
    };
    for(int v = 0; v < n; v++) dfs(dfs, v);
    cout << n << ' ' << ans.size() << '\n';
    for(auto &&pa : ans) cout << pa.first << ' ' << pa.second << '\n';
}