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#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("sortaret.in");
ofstream fout("sortaret.out");
int n, m;
bool a[30][30];
void read(){
fin>>n>>m;
int x, y;
for(int i=1; i<=m; i++){
fin>>x>>y;
a[x][y]=1;
}
}
bool vizitat[30];
void adancime(int nod){
vizitat[nod]=true;
fout<<nod<<' ';
for(int i=1; i<=n; i++)
if(a[nod][i]==true && vizitat[i]==false)
adancime(i);
}
int main() {
read();
adancime(1);
}