#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<pair<int,int>>> g(n);
    for(int i = 0; i < m; i++){
        int u, v;
        cin >> u >> v;
        u--, v--;
        g[u].emplace_back(v, 0);
    }

    vector<int> idx(n);
    vector<bool> used(n), visited(n);

    auto dfs = [&](auto dfs, int v) -> int {
        if(used[v]) return -1;
        if(visited[v]) return v;
        visited[v] = true;
        for(int &j = idx[v]; j < g[v].size(); j++){
            int u, c;
            tie(u, c) = g[v][j];
            if(c == 1) continue;
            int res = dfs(dfs, u);
            if(res != -1){
                g[v][j] = make_pair(u, 1);
                if(res != v){
                    visited[v] = false;
                    return res;
                }
            }
        }
        visited[v] = false;
        used[v] = true;
        return -1;
    };

    for(int v = 0; v < n; v++) dfs(dfs, v);

    vector<pair<int,int>> edge;
    for(int v = 0; v < n; v++){
        for(auto &&pa : g[v]){
            if(pa.second) continue;
            edge.emplace_back(v, pa.first);
        }
    }
    cout << n << " " << edge.size() << '\n';
    for(auto &&pa : edge){
        cout << pa.first + 1 << ' ' << pa.second + 1 << '\n';
    }
}