#include<bits/stdc++.h>
using namespace std;
int main()
{
int n,m;
cin>>n>>m;
vector<int> adj[n+1];
for(int i=0;i<m;i++)
{
int u,v;
cin>>u>>v;
adj[u].push_back(v);
adj[v].push_back(u);
}
return 0;
}
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