#include<cstdio>
#include<vector>
using namespace std;
vector<int>l[50100];
int n,m,i,j,x,y,p,u,c[100100],v[100100];
FILE *f,*g;
int main(){
    f=fopen("sortaret.in","r");
    g=fopen("sortaret.out","w");
    fscanf(f,"%d%d",&n,&m);
    for(i=1;i<=m;i++){
        fscanf(f,"%d%d",&x,&y);
        l[x].push_back(y);
        v[y]++;
    }
    for(i=1;i<=n;i++){
        if(v[i]==0){
            c[++u]=i;
        }
    }
    p=1;
    while(p<=u){
        x=c[p];
        for(i=0;i<l[x].size();i++){
            v[l[x][i]]--;
            if(v[l[x][i]]==0){
                c[++u]=l[x][i];
            }
        }
        p++;
    }
    for(i=1;i<=u;i++){
        fprintf(g,"%d ",c[i]);
    }






    fclose(f);
    fclose(g);
    return 0;
}