#include <bits/stdc++.h>

using namespace std;
int n,m,t[50002],k;
vector<int> a[50002];
bool viz[50002];

inline void Citirea()
{
    int x,y,i;
    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;
    Citirea();
    ofstream fout("sortaret.out");
    for(i=1;i<=n;i++)
        if(!viz[i]) DFS(i);

    for(i=k;i>0;i--)
        fout<<t[i]<<" ";

    fout.close();
    return 0;
}