#include <iostream>
#include <fstream>
#include <vector>
#define dMAX 100000

using namespace std;

int n, m, x, y;
vector<int> graf[dMAX + 2];
bool viz[dMAX + 2];
int topSort[dMAX + 2];

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

void DFS(int v) {
    int newV, u;
    viz[v] = true;
    for (u = 0; u < graf[v].size(); u++) {
        newV = graf[v][u];
        if (!viz[newV]) {
            DFS(newV);
        }
    }
    fout << v << ' ';
    //topSort[++topSort[0]] = v;
}

int main()
{
    int i, j;
    fin >> n >> m;
    for (i = 1; i <= m; i++) {
        fin >> x >> y;
        graf[x].push_back(y);
    }

    for (i = 1; i <= n; i++) {
        if (!viz[i]) {
            DFS(i);
        }
    }

    //for (i = n; i >= 1; i--) fout << topSort[i] << ' ';

    return 0;
}