#include <bits/stdc++.h>
#define Dim 50001
using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out"); //0 alb 1 gri 2 negru

vector < int > V[Dim];

int N,M,x,y,viz[Dim],D[Dim],F[Dim],timp,Ans[Dim],cnt;

void DFS(int nod)
{
    viz[nod]=1;
    D[nod]=timp=timp+1;
    for(unsigned int i=0;i<V[nod].size();i++)
    {
        int vecin=V[nod][i];
        if(!viz[vecin])
        {
            viz[vecin]=1;
            DFS(vecin);
        }
    }
    viz[nod]=2;
    F[nod]=timp=timp+1;
    Ans[++cnt]=nod;
}

int main()
{
    f>>N>>M;
    for(int i=1;i<=M;i++)
    {
        f>>x>>y;
        V[x].push_back(y);
    }
    for(int i=1;i<=N;i++)
    if(!viz[i])
    DFS(i);

    for(int i=cnt;i>=1;i--) g<<Ans[i]<<" ";

    return 0;
}