#include <bits/stdc++.h>

using namespace std;
typedef pair < int , int > PII;

int n, m, inD[50010];
vector < int > V[50100];
stack < int > R;
bitset < 50010 > B;

void dfs(int x){
    B[x] = 1;

    for (auto it : V[x]){
        if (B[it]) continue;
        dfs(it);
    }

    R.push(x);
}

int main(){
    ifstream cin("sortaret.in");
    ofstream cout("sortaret.out");

    cin >> n >> m;
    for (int i = 1, x, y; i <= m; i++){
        cin >> x >> y;
        V[x].push_back(y);
        inD[y]++;
    }

    for (int i = 1; i <= n; i++)
        if (inD[i] == 0) dfs(i);

    while (R.size()){
        cout << R.top() << " ";
        R.pop();
    }
    return 0;
}