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#include <iostream>
#include <fstream>
#include <vector>
using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out");
vector< vector < int > >graf;
vector < int > viz;
int n,m;
void DFS(int nod)
{
viz[nod]=1;
int lim = graf[nod].size();
for(int i=0; i<lim; i++)
{
int vecin = graf[nod][i];
if(viz[vecin] == 0)DFS(vecin);
}
g<<nod<<" ";
}
int main()
{
f>>n>>m;
graf.resize(n+1);
viz.resize(n+1,0);
int i;
for(i=1; i<=m; i++)
{
int x,y;
f>>x>>y;
graf[y].push_back(x);
}
for(i=1;i<=n;i++)
{
if(viz[i]==0)
{
DFS(i);
}
}
return 0;
}