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#include <fstream>
#include<vector>
#include<stack>
using namespace std;
ifstream fin("sortaret.in");
ofstream fout("sortaret.out");
vector<int> graf[50001];
int v[50001];
void dfs(int i){
v[i]=1;
for(int nod: graf[i]){
if(v[nod]==0){
v[nod]=1;
dfs(nod);
}
}
fout<<i<<" ";
}
int main(){
int n, m, x, y;
fin>>n>>m;
for(int i=1; i<=m; i++){
fin>>x>>y;
graf[x].push_back(y);
}
for(int i=1; i<=n; i++){
if(v[i]==0){
dfs(i);
}
}
return 0;
}