#include <cstdio>
#include <queue>
#include <list>

using namespace std;

list<int> adj[50001];
int degree[50001], vertices, edges, u, v;

int main(){

    freopen("sortaret.in", "r", stdin);
    freopen("sortaret.out", "w", stdout);

    scanf("%d %d", &vertices, &edges);

    for(int i = 1; i <= edges; i++){
        scanf("%d %d", &u, &v);
        adj[u].push_back(v);
        degree[v]++;
    }
    queue<int> Q;

    for(int node = 1; node <= vertices; node++){
        if(degree[node] == 0){
            Q.push(node);
        }
    }
    while(!Q.empty()){

        int current = Q.front(); Q.pop();
        printf("%d ", current);

        for(list<int>::iterator it = adj[current].begin(); it != adj[current].end(); it++){
            Q.push(*it);
        }
    }
    return 0;
}