#include <stdio.h>
#include <vector>
using namespace std;
vector<unsigned> graf[50001],coada;
bool viz[50001];
long i,n,m,x,y;
FILE *f1,*f2;

void dfs(unsigned x)
{
    viz[x]=true;
    for(unsigned i=0;i<graf[x].size();i++)
        if(viz[graf[x][i]]==false)
            dfs(graf[x][i]);
    coada.push_back(x);
}
int main()
{
    f1=fopen("sortaret.in","r");
    f2=fopen("sortaret.out","w");
    fscanf(f1,"%ld%ld",&n,&m);
    for(i=0;i<m;i++)
    {
        fscanf(f1,"%ld%ld",&x,&y);
        graf[x].push_back(y);
    }
    for(i=1;i<=n;i++)
        if(viz[i]==false)
            dfs(i);
    for(i=coada.size()-1;i>=0;i--)
        fprintf(f2,"%u ",coada[i]);
    return 0;
}