#include <fstream>

#define nMax 50005
#define mMax 100005

using namespace std;

ifstream in("sortaret.in");
ofstream out("sortaret.out");


int i;
int a, b;
int n, m, coun[nMax];
int rst[nMax][mMax], nr[nMax], coada[nMax], st, dr;

inline void okuma()
{
    in >> n >> m;
    for(i = 0; i < m; ++i)
    {
        in >> a >> b;
        ++coun[a];
        rst[a][nr[a]] =  b;
        ++nr[a];
    }
}

int main()
{
    okuma();
}