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#include <bits/stdc++.h>
#define nMax 400005
using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out");
int n,m,x,y,viz[50005];
vector <int> v[50005];
void dfs(int nod)
{viz[nod]=1;
for(int i=0;i<v[nod].size();i++)
{
if(viz[v[nod][i]]==0) {dfs(v[nod][i]);}
}
g<<nod<<" ";
}
int main()
{
f >> n >> m;
for(int i=1; i<=m; i++)
{
f>>x>>y;
v[y].push_back(x);
}
for(int i=1;i<=n;i++)
{
if(viz[i]==0) dfs(i);
}
}