#include <bits/stdc++.h>
 
using namespace std;
typedef unsigned long long ll;
typedef pair< int , int > PII;

int n, m, x, y, root;
vector < vector < int > > V;
vector < int > Ans, in;
bitset < 50100 > viz;

inline void dfs(int x){
    viz[x] = 1;
    Ans.push_back(x);

    for (auto it : V[x]){
        if (!viz[it]) dfs(it);
    }
}

int main(){
    ifstream cin("sortaret.in");
    ofstream cout("sortaret.out");
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    cin >> n >> m;
    V.resize(n + 1);
    in.resize(n + 1);

    for (int i = 0; i < m; i++){
        cin >> x >> y;
        V[x].push_back(y);
        in[y]++;
    }

    for (int i = 1; i <= n; i++){
        if (in[i] == 0) root = i;
    }

    dfs(root);

    for (auto it : Ans) cout << it << " ";
    
    return 0;
}