#include <bits/stdc++.h>

using namespace std;

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

vector <int> gr[100005];
vector <int> rgr[100005];
vector <int> q;
vector <int> v;
int f[100005],fr[100005],dp[100005];

int main()
{
    int n,m;
    fin >> n >> m;
    for (int i=1;i<=m;++i){
        int x,y;
        fin >> x >> y;
        f[y]++;
        fr[y]++;
        gr[x].push_back(y);
        rgr[y].push_back(x);
    }
    for (int i=1;i<=n;++i){
        if (f[i]==0){
            q.push_back(i);
            dp[i] = 0;
        }
    }
    while (q.size()>0){
        int node = q.back();
        v.push_back(node);
        q.pop_back();
        for (auto x:gr[node]){
            f[x]--;
            if (f[x]==0){
                q.push_back(x);
            }
        }
    }
    for (auto x:v){
        fout << x << ' ';
    }
    return 0;
}