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#include<cstdio>
#include<vector>
using namespace std;
int n,m;
int viz[50010];
int res[50010],sz;
vector<int> adj[50010];
void tplg(int nod)
{
viz[nod]=1;
for(vector<int>::iterator it=adj[nod].begin();it!=adj[nod].end();it++)
{
if(viz[*it]==0)
{
tplg(*it);
}
}
sz++;
res[sz]=nod;
}
int main()
{
freopen("sortaret.in","r",stdin);
freopen("sortaret.out","w",stdout);
scanf("%d %d",&n,&m);
int x,y;
for(int i=1;i<=m;i++)
{
scanf("%d %d",&x,&y);
adj[x].push_back(y);
}
for(int i=1;i<=n;i++)
{
if(viz[i]==0)
{
tplg(i);
}
}
for(int i=n;i>0;i--)
{
printf("%d ",res[i]);
}
}