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#include <iostream>
#include <fstream>
#include <vector>
using namespace std;
#define NMAX 100005
ifstream fin("sortaret.in");
ofstream fout("sortaret.out");
int nrNoduri, nrMuchii;
vector <int> graf[NMAX];
bool vizitat[NMAX];
void dfs(int nodStart){
vizitat[nodStart] = true;
int nrVecini = graf[nodStart].size();
for ( int vecin = 0; vecin < nrVecini; vecin++){
if ( !vizitat[graf[nodStart][vecin]] )
dfs(graf[nodStart][vecin]);
}
fout << nodStart << " ";
}
int main(){
fin >> nrNoduri >> nrMuchii;
for ( int i = 1; i <= nrNoduri; i++)
vizitat[i] = false;
for ( int i = 1; i <= nrMuchii; i++){
int x,y;
fin >> x >> y;
graf[y].push_back(x);
}
for ( int i = 1; i <= nrNoduri; i++)
if ( !vizitat[i] )
dfs(i);
return 0;
}