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#include <fstream>
#include <vector>
using namespace std;
ifstream cin("sortaret.in");
ofstream cout("sortaret.out");
void rezolvare(vector<int> data[50005], int n,int ex[500],int i){
if(i<=n){
if(ex[i]!=1){
ex[i]=1; cout<<i<<" "; rezolvare(data,n,ex,i);
}
else if(data[i].size()>0){
rezolvare(data,n,ex,data[i].front());
data[i].erase(data[i].begin());
rezolvare(data,n,ex,i);
}
}
}
int main(){
int n,m,a,b;
cin>>n>>m;
int ex[n];
vector<int> data[50005];
for(int i=1;i<=m;i++){
cin>>a>>b; data[a].push_back(b);
}
for(int i=1;i<=n;i++){
if(ex[i]!=1)
rezolvare(data,n,ex,i);
}
return 0;
}