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#include <fstream>
#include <vector>
#include <deque>
using namespace std;
vector<vector<int> > L(50000 + 1);
//vector<int> sol(1);
bool viz[50000 + 1];
int n, m, i, j, x, y;
int cc;
ofstream fout("sortaret.out");
void travad(int i)
{
fout << i << ' ';
viz[i] = 1;
for (std::vector<int>::iterator it = L[i].begin(); it != L[i].end(); ++it)
if (viz[*it] == false)
travad(*it);
///int j = 0;
///while(!L[i].empty())
///{
/// if(viz[L[i][j]] == 0)
/// travad(L[i][j]);
/// L[i].pop_front();
///}
}
int main()
{
ifstream fin("sortaret.in");
fin >> n >> m;
for(i = 1; i <= m; i++)
{
fin >> x >> y;
L[x].push_back(y);
//L[y].push_back(x);
}
// for(i = 1; i <= n; i++)
// {
// cout << i << ": ";
// for(j = 0; j < L[i].size(); j++)
// {
// cout << L[i][j] << ' ';
// }
// cout << '\n';
// }
// cout << '\n';
for(i = 1; i <= n; i++)
{
if(viz[i] == 0)
{
//cc++;
travad(i);
}
}
//for(i = 1; i < sol.size(); i++)
//fout << sol[i] << ' ';
//cout << cc;
}