#include <fstream>
#include <vector>
using namespace std;
ifstream fi("sortaret.in");
ofstream fo("sortaret.out");

int n,m,viz[50001],x,y;
vector<int>G[50001];

void DF(int x)
{
viz[x]=1;
for(auto i : G[x])
    { if(viz[i]) continue;
      DF(i);
    }
fo<<x<<" ";
}

int main()
{

fi>>n>>m;
for(int i=1;i<=m;++i)
{
fi>>x>>y;
G[y].push_back(x);
}

for(int i=1;i<=n;++i)
  if(!viz[i])DF(i);
}