#include <bits/stdc++.h>

using namespace std;

int n,m,t[50003],k;
bool viz[50003];
vector<int>a[50003];

inline void Citire()
{
    int i,x,y;
    ifstream fin("sortaret.in");
    fin>>n>>m;
    for(i=1;i<=m;++i)
    {
        fin>>x>>y;
        a[x].push_back(y);
    }
    fin.close();
}

inline void DFS(int x)
{
    int y;
    unsigned int i;
    viz[x]=true;
    for(i=0;i<a[x].size();++i)
    {
        y=a[x][i];
        if(!viz[y])
            DFS(y);
    }
    t[++k]=x;
}

int main()
{
    int i;
    Citire();
    for(i=1;i<=n;++i)
        if(!viz[i])
            DFS(i);
    ofstream fout("sortaret.out");
    for(i=k;i>=1;--i)
        fout<<t[i]<<" ";
    fout<<"\n";
    fout.close();
    return 0;
}