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#include<bits/stdc++.h>
using namespace std;
ifstream fin("sortaret.in");
ofstream fout("sortaret.out");
int n,m,Vector[500001],i,x,y;
vector <int>Graf[500001];
stack <int> stiva;
void FunctieDFS(int NOD)
{
Vector[NOD]=1;
for(int i=0;i<Graf[NOD].size();i++)
{
if(!Vector[Graf[NOD][i]])
FunctieDFS(Graf[NOD][i]);
}
stiva.push(NOD);
}
int main()
{
fin>>n;
fin>>m;
for(i=1;i<=m;i++)
{
fin>>x;
fin>>y;
Graf[x].push_back(y);
}
for(i=1;i<=n;i++)
if(!Vector[i])
FunctieDFS(i);
while(!stiva.empty())
{
fout<<stiva.top()<<" ";
stiva.pop();
}
return 0;
}