#include <fstream>
#include <vector>

using namespace std;

ifstream fin("sortaret.in");
ofstream fout("sortaret.out");

const int NMAX = 50001;
vector<int> g[NMAX], sol;
int v[NMAX], n, m;

void dfs(int k){
    v[k] = 1;
    for(auto vec : g[k]) if(!v[vec]) dfs(vec);
    sol.push_back(k);
}

int main(){
    fin >> n >> m;
    for(int i = 1; i <= m; i++){
        int x, y;
        fin >> x >> y;
        g[x].push_back(y);
    }
    for(int i = 1; i <= n; i++) if(!v[i]) dfs(i);
    for(auto i : sol) fout << i << ' ';
    return 0;
}