#include <iostream>
#include <fstream>
#include <vector>
#define nmax 50001
using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out");
vector <int> a[nmax];
int n,m,vis[nmax],d[nmax],nr;
void citire() {
    f>>n>>m;
    int x,y;
    for (int i=1;i<=m;i++) {
        f>>x>>y;
        a[x].push_back(y);
    }
}
void DFS(int x) {
    vis[x]=1;
    for (int i=0;i<a[x].size();i++) {
        int p=a[x][i];
        if (vis[p]==0) {
            DFS(p);
        }
    }
    d[++nr]=x;
}
void rez() {
    for (int i=1;i<=n;i++) {
        if (vis[i]==0) {
            DFS(i);
        }
    }
    for (int i=n;i>=1;i--) {
        g<<d[i]<<" ";
    }
}
int main() {
    citire();
    rez();
    return 0;
}