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#include <iostream>
#include <fstream>
#include <vector>
#include <bitset>
using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out");
vector <int> G[100001];
bitset <100001> viz;
int x,lista[100001];
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]);
}
lista[++x]=nod;
}
int main()
{
int N,M,i,a,b;
f>>N>>M;
for(i=1;i<=M;i++)
{
f>>a>>b;
G[a].push_back(b);
}
for(i=1;i<=N;i++)
if(viz[i]==0)
DFS(i);
for(i=x;i>=1;i--)
g<<lista[i]<<" ";
return 0;
}