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#include <bits/stdc++.h>
using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out");
vector <int> v[50100],sol;
int viz[50100];
void dfs(int nod)
{
viz[nod]=1;
for(int i=0;i<v[nod].size();i++)
{
int vecin=v[nod][i];
if(viz[vecin]==0)dfs(vecin);
}
sol.push_back(nod);
}
int n,m,i,x,y,N;
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(viz[i]==0)dfs(i);
N=sol.size();
for(i=N-1;i>=0;i--)g<<sol[i]<<" ";
return 0;
}