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#include <iostream>
#include <fstream>
using namespace std;
ifstream f("dfs.in");
ofstream g("dfs.out");
int n,m,x,viz[101]={0},a[101][101];
void citire ()
{
int y,z;
f>>n>>m>>x;
for(int i=1;i<=m;i++)
{
f>>y>>z;
a[y][z]=1;
a[z][y]=1;
}
}
void dfs(int x)
{
g<<x<<" ";
viz[x]=1;
for(int i=1;i<=n;i++)
if(a[x][i]==1 && viz[i]==0)
dfs(i);
}
int main()
{
citire();
dfs(x);
return 0;
}