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

inline int get_nr(){

    int number = 0;
    char c = getchar();

    while(!(47 < c && c < 58)){
        c = getchar();
    }
    while(47 < c && c < 58){
        number = number * 10 + c - '0';
        c = getchar();
    }
    return number;
}

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);

    vertices = get_nr();
    edges = get_nr();

    for(int i = 1; i <= edges; i++){
        u = get_nr();
        v = get_nr();
        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++){
            degree[*it]--;
            if(degree[*it] == 0){
                Q.push(*it);
            }
        }
    }
    return 0;
}