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#include <bits/stdc++.h>
# define MAXN 50009
using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out");
vector<int> G[MAXN];
bool v[MAXN];
int n,m;
void dfs(int nod)
{
v[nod] = 1;
for(int i=0; i< G[nod].size(); i++)
if(!v[G[nod][i]]) dfs(G[nod][i]);
g<<nod<<" ";
}
int main()
{
f>>n>>m;
for(int i=1;i<=m;i++)
{
int x,y;
f>>x>>y;
G[x].push_back(y);
}
for(int i=1;i<=n;i++)
if(!v[i]) dfs(i);
return 0;
}