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#include <iostream>
#include <fstream>
#include <vector>
using namespace std;
vector<int> coada;
struct nod
{
vector<int> fii;
bool vizitat;
};
nod s[100000];
void rez(int x)
{
int i;
s[x].vizitat=true;
for (i=0;i<s[x].fii.size();i++)
{
if (s[s[x].fii[i]].vizitat==false)
{
rez(s[x].fii[i]);
}
}
coada.push_back(x);
}
int main()
{
ifstream in("sortaret.in");
ofstream out("sortaret.out");
int i,n,m,x,y;
in>>n;
in>>m;
for (i=1;i<=n;i++)
{
s[i].vizitat=false;
}
for (i=1;i<=m;i++)
{
in>>x;
in>>y;
s[x].fii.push_back(y);
}
for (i=1;i<=n;i++)
{
if (s[i].vizitat==false)
{
rez(i);
}
}
for (i=coada.size()-1;i>=0;i--)
{
out<<coada[i]<<" ";
}
}