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#include <fstream>
#include <vector>
using namespace std;
ifstream fin("sortaret.in");
ofstream fout("sortaret.out");
vector <int>vect[50001];
int main()
{
int nr=0,n,m,i,x,y,j;
fin>>n>>m;
for(i=1;i<=n;i++)
vect[i].push_back(0);
for(i=1;i<=m;i++)
{
fin>>x>>y;
vect[x].push_back(y);
vect[y][0]++;
}
while(nr<n)
{
for(i=1;i<=n;i++)
if(vect[i][0]==0)
{
fout<<i<<' ';j=vect[i].size();j--;
vect[i][0]=-1;
while(j>=1)
{
vect[vect[i][j]][0]--;
j--;
}
nr++;
}
}
return 0;
}