#include <bits/stdc++.h>

using namespace std;

ifstream fin("sortaret.in");
ofstream fout("sortaret.out");

int a ,b ,i, j, k, n, m, gi[50001], mat[50001][1001], q[50001], p,s;
bool viz[50001];
int main()
{
    fin>>n>>m;
    for(i =1; i<=m; i++){
        fin>>a>>b;
        mat[a][0]++;
        mat[a][mat[a][0]] = b;
        gi[b]++;
    }

    p =0;
    for(i =1; i<=n; i++){
        if(gi[i] == 0){
            p++;
            viz[i] =1;
            q[p] = i;
        }
    }

    s =1;
    while(s <= p){
        for(i =1; i<=mat[q[s]][0]; i++){
            gi[mat[q[s]][i]]--;
            if(gi[mat[q[s]][i]] == 0 && viz[mat[q[s]][i]] == 0){
                p++;
                viz[mat[q[s]][i]] = 1;
                q[p] = mat[q[s]][i];
            }
        }
        s++;
    }

    for(i =1; i<= p;i++){
        fout<<q[i]<<" ";
    }
}