#include <iostream>
#include <fstream>
#include <vector>
#define NMAX 50001

using namespace std;

ifstream f("sortaret.in");
ofstream g("sortaret.out");

int n, m;
bool viz[NMAX];
vector <int> v[NMAX], rez;

void DF(int rad)
{
    int i, sz;

    viz[rad] = true;
    sz = v[rad].size();
    for(i=0;i<sz;++i)
        if(!viz[v[rad][i]])
            DF(v[rad][i]);

    rez.push_back(rad);
}

int main()
{
    int i, sz, x, y;

    f>>n>>m;
    for(i=1;i<=m;++i){
        f>>x>>y;
        v[x].push_back(y);
    }

    for(i=1;i<=n;++i)
        if(!viz[i])
            DF(i);

    sz = rez.size() - 1;
    for(i=sz;i>=0;--i)
        g<<rez[i]<<' ';

    return 0;
}