#include <fstream>
#include <vector>
#define pb push_back
using namespace std;
ifstream fin ("sortaret.in");
ofstream fout ("sortaret.out");
const int nmax=50002;
const int mmax=100002;

vector <int> muc[nmax];
bool viz[nmax];
int stiva[nmax],hstk;
int n,m;

void topologic(int x)
{
    viz[x]=1;

    for(auto it:muc[x])
    {
        if(!viz[it])
            topologic(it);
    }

    hstk++;
    stiva[hstk]=x;
}

int main()
{
    fin>>n>>m;
    for(int i=1;i<=m;i++)
    {
        int x,y;
        fin>>x>>y;
        muc[x].pb(y);
    }

    for(int i=1;i<=n;i++)
        if(viz[i]==0)
            topologic(i);

    for(int i=hstk;i>0;i--)
        fout<<stiva[i]<<' ';
    return 0;
}