#include <cstdio>
#include <vector>
#include <deque>

using namespace std;
FILE *f,*g;

vector <int> nod[50002];
bool viz[50002];
int nr=0,n;
deque <int> coada;

void euler(int no)
{
    int vecin;
    viz[no]=1;
    while(nod[no].size())
    {
        vecin=nod[no].back();
        nod[no].pop_back();
        if(!viz[vecin])
           euler(vecin);
    }
    coada.push_back(no);

}
int main()
{
    f=fopen("sortaret.in","r");
    g=fopen("sortaret.out","w");
    int m,x,y;
    fscanf(f,"%d %d",&n,&m);
    for(int i=1;i<=m;++i)
    {
        fscanf(f,"%d %d",&x,&y);
        nod[x].push_back(y);
    }

    for(int i=1;i<=n;++i)
        if(!viz[i])
            euler(i);
    while(!coada.empty())
    {
        x=coada.back();
        coada.pop_back();
        fprintf(g,"%d ",x);
    }
    fclose(f);
    fclose(g);
    return 0;
}