#include <iostream>
#include <cstdio>
#include <vector>

using namespace std;

int viz[50001];

void walk(vector<vector<int>> v, int startv, vector<int> &sortt){
    sortt.push_back(startv+1);
    viz[startv] = 1;
    for(auto e : v[startv])
        if(!viz[e])
            walk(v, e, sortt);
}

int main() {
    freopen("sortaret.in", "r", stdin);
    freopen("sortaret.out", "w", stdout);
    int n, m;
    scanf("%d %d\n", &n, &m);
    vector<vector<int>> v;
    vector<int> vin;
    vin.resize(n);
    v.resize(n);
    for(int i=0;i<m;i++){
        int a, b;
        scanf("%d %d\n", &a, &b);
        v[a-1].push_back(b-1);
        vin[b-1] = 1;
    }
    int startv = -1;
    vector<int> sortt;
    for(int i=0;i<n;i++)
        if(!viz[i])
            walk(v, i, sortt);
    for(auto e : sortt)
        cout<<e<<' ';
    return 0;
}