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#include <iostream>
#include <fstream>
#include <vector>
using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out");
vector <int> v[10001];
long d[50000],sol[50000],n,m,k,x,y,i;
void dfs(int nod)
{
d[nod]=1;
for(i=0; i<v[nod].size(); i++)
{
if(!d[v[nod][i]])
{
dfs(v[nod][i]);
}
}
sol[++k]=nod;
}
int main()
{
f>>n>>m;
for(i=1;i<=m;i++)
{
f>>x>>y;
v[x].push_back(y);
}
for(i=1;i<=n;i++){
if(!d[i])dfs(i);
}
for(i=k; i>=1; i--)
{
g<<sol[i]<<" ";
}
return 0;
}