#include<stdio.h>
#include<vector>
using namespace std;
#define MAXN 50001
vector<int>v[MAXN];
int n,m,k,viz[MAXN],sol[MAXN];
void citire(){
    int i,x,y;
    scanf("%d%d",&n,&m);
    for(i=1;i<=m;i++){
        scanf("%d%d",&x,&y);
        v[x].push_back(y);
    }
}
void dfs ( int nod ){
    int i;
    viz[nod]=1;
    for(i=0;i<v[nod].size();i++)
        if(viz[v[nod][i]]==0)
            dfs(v[nod][i]);
    k++;
    sol[k]=nod;
}
int main(){
    int i;
    freopen("sortaret.in","r",stdin);
    freopen("sortaret.out","w",stdout);
    citire();
    for(i=1;i<=n;i++)
        if(viz[i]==0)
            dfs(i);
    for(i=k;i>=1;i--)
        printf("%d ",sol[i]);
    return 0;
}