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#include <bits/stdc++.h>
using namespace std;
ifstream fin("sortaret.in");
ofstream fout("sortaret.out");
const int nMax = 50010;
vector <int> v[nMax], prez;
void dfs(int nod)
{
prez[nod] = true;
for(auto it : v[nod])
if(!prez[it]) dfs(it);
fout << nod + 1 << " ";
}
int main()
{
int n, m; fin >> n >> m;
prez.assign(n, 0);
for(int i=0; i<m; i++)
{
int x, y; fin >> x >> y; x--; y--;
v[y].push_back(x);
}
for(int i=0; i<n; i++)
if(!prez[i])
dfs(i);
return 0;
}