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#include <bits/stdc++.h>
#define maxLimit 50005
using namespace std;
vector<int>G[maxLimit];
queue<int> coada;
ifstream fin("sortaret.in");
ofstream fout("sortaret.out");
int n, m, x, y, viz[maxLimit], rez[maxLimit], k;
void DFS(int nod)
{
viz[nod]=1;
for(int i=0; i<G[nod].size(); i++)
{
if(viz[G[nod][i]]==0)
{
DFS(G[nod][i]);
}
}
k++;
rez[k]=nod;
}
int main()
{
fin>>n>>m;
for(int i=1; i<=m; i++)
{
fin>>x>>y;
G[x].push_back(y);
}
for(int i=1; i<=n; i++)
if(viz[i]==0)
DFS(i);
for(int i=n; i>=1; i--)
{
fout<<rez[i]<<" ";
}
return 0;
}