#include <cstdio>
#include <vector>
using namespace std;
#define NMAX 50010
typedef vector<int>::iterator iter;
vector <int> G[NMAX],list;
char color[NMAX];
int n,m;

FILE* fin=fopen("sortaret.in","r");
FILE* fout=fopen("sortaret.out","w");
 
void DFS(int k){
color[k]=1;
for(iter it=G[k].begin();it!=G[k].end();it++){
if(color[*it]==0){

DFS(*it);
}

}
color[k]=2;
list.push_back(k);
}
int main(){
fscanf(fin,"%d %d\n",&n,&m);
int x,y;
for(int i=0;i<m;i++){
fscanf(fin,"%d %d\n",&x,&y);
G[x].push_back(y);
}
for(int i=1;i<=n;i++){
if(color[i]==0){
DFS(i);
}   
}
for(iter it=list.end()-1;it>=list.begin();it--){
fprintf(fout,"%d ",*it);
}
fclose(fin);
fclose(fout);
return 0;
}