#include <fstream>
#include <vector>
#define NMAX 50000
#define MMAX 100000

using namespace std;
ifstream fi("sortaret.in");
ofstream fo("sortaret.out");
int n, m, nr;
int VIZ[NMAX+5], post[NMAX+5];
vector <int> G[NMAX+5];

void citire(void)
{
    int x, y;
    fi>>n>>m;
    for(int i=1; i<=m; i++)
    {
        fi>>x>>y;
        G[x].push_back(y);
    }
}

void dfsPost(int nod)
{
    VIZ[nod]=1;
    for(auto vec:G[nod])
        if(!VIZ[vec])
            dfsPost(vec);
    post[++nr]=nod;
}

void afisare(void)
{
    for(int i=n; i>=1; i--)
        fo<<post[i]<<" ";
}

int main()
{
    citire();
    for(int i=1; i<=n; i++)
        if(!VIZ[i])
            dfsPost(i);
    afisare();
    fi.close();
    fo.close();
    return 0;
}