#include <stdio.h>
#include <vector>
#define lim 50005
using namespace std;
std::vector <int> v[lim];
int ord[lim],viz[lim],k,q[lim];
int main(){
    FILE *fin,*fout;
    fin=fopen("sortaret.in","r");
    fout=fopen("sortaret.out","w");
    int i,n,m,x,y,st,dr,a,b;
    fscanf(fin,"%d%d",&n,&m);
    for(i=1;i<=m;i++){
        fscanf(fin,"%d%d",&x,&y);
        v[x].push_back(y);
        viz[y]++;
    }
    st=1;
    dr=0;
    for(i=1;i<=n;i++){
        if(viz[i]==0){
            dr++;
            q[dr]=i;
        }
    }
    while(st<=dr){
        k++;
        ord[k]=q[st];
        b=v[q[st]].size();
        for(a=0;a<b;a++){
            viz[v[q[st]][a]]--;
            if(viz[v[q[st]][a]]==0){
                dr++;
                q[dr]=v[q[st]][a];
            }
        }
        st++;
    }
    for(i=1;i<=n;i++)
        fprintf(fout,"%d ",ord[i]);
    fclose(fin);
    fclose(fout);
    return 0;
}