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


int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int N; cin >> N;
    int M; cin >> M;
    vector<vector<int>> adj(N);
    for(int i=0; i<M; i++){
        int u, v; cin >> u >> v;
        u--; v--;
        adj[u].push_back(v);
    }

    vector<int> adj_at(N, 0);
    vector<int> visiting(N, 0);

    // mark edges in eliminated cycles : adj[v][i] = -1
    auto dfs = [&](auto& dfs, int v) -> int {
        visiting[v] = 1;
        while(adj_at[v] < (int)adj[v].size()){
            int w = adj[v][adj_at[v]];
            if(visiting[w]){
                adj[v][adj_at[v]] = -1;
                adj_at[v]++;
                visiting[v] = 0;
                return w;
            }
            int res = dfs(dfs, w);
            if(res >= 0){
                adj[v][adj_at[v]] = -1;
                if(res != v){
                    visiting[v] = 0;
                    adj_at[v]++;
                    return res;
                }
            }
            adj_at[v]++;
        }
        visiting[v] = 0;
        return -1;
    };

    for(int s=0; s<N; s++) dfs(dfs, s);

    vector<pair<int, int>> ans;
    for(int v=0; v<N; v++){
        for(int w : adj[v]) if(w != -1){
            ans.push_back({ v, w });
        }
    }

    cout << N << ' ' << ans.size() << '\n';
    for(auto a : ans){
        cout << (a.first + 1) << ' ' << (a.second + 1) << '\n';
    }

    return 0;
}