#include <iostream>
#include <fstream>
#include <vector>
#include <deque>
#include <cstdlib>

enum Color
{
    WHITE, GREY, BLACK
};

struct Vertex
{
    int u;
    std::vector<int> myV;
    Vertex() : u(), myV() {}
};

void visit(Vertex *A, Color *B, int u, std::deque<int> &myS);

void toposort(Vertex *A, int nV, std::deque<int> &myS);

int main()
{
    std::ifstream in("sortaret.in");
    std::ofstream out("sortaret.out");

    int nV, nE, a, b;

    in >> nV >> nE;
    Vertex *Arr = new Vertex[nV + 1];
    for(int i = 1; i <= nV; i++)
        Arr[i].u = i;
    for(int i = 0; i < nE; i++)
        in >> a >> b, Arr[a].myV.push_back(b);

    std::deque<int> myS;

    while(!myS.empty())
        out << myS.front() << ' ', myS.pop_front();

    return 0;
}

void visit(Vertex *A, Color *B, int u, std::deque<int> &myS)
{
    if(B[u] == GREY)
    {
        exit(1);
    }
    if(B[u] == BLACK) return;
    B[u] = GREY;
    for(unsigned i = 0; i < A[u].myV.size(); i++)
        visit(A, B, A[u].myV[i], myS);
    B[u] = BLACK;
    myS.push_front(u);
}

void toposort(Vertex *A, int nV, std::deque<int> &myS)
{
    Color *B = new Color[nV + 1];
    for(int i = 0; i <= nV; i++)
        B[i] = WHITE;
    for(int i = 1; i <= nV; i++)
        if(B[i] == WHITE) visit(A, B, i, myS);
}