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

const int NMAX = 100005;

vector<int> g[NMAX];
bool        f[NMAX];

int main(void) {
    freopen("mesaj4.in", "r", stdin);
    freopen("mesaj4.out", "w", stdout);
    int n, m, a, b;

    scanf("%d%d",&n,&m);
    for(int i=0; i<m; ++i) {
        scanf("%d%d",&a,&b);
        g[a].push_back(b);
        g[b].push_back(a);
    }

    fclose(fi);
    fclose(fo);
    return 0;
}