#include <bits/stdc++.h>
#define ll long long
#define lf long double

using namespace std;

ifstream fin("sortaret.in");
ofstream fout("sortaret.out");

int n,m,t[50001],viz[50001];
vector<int> v[50001];

void dfs(int nod)
{
    viz[nod]=1;
    for (auto vec:v[nod])
        if (!viz[vec])
        dfs(vec);
    t[++t[0]]=nod;
}

int main()
{
    ios_base::sync_with_stdio(false);
    fin>>n>>m;
    int x,y;
    for (int i=1;i<=m;i++)
    {
        fin>>x>>y;
        v[x].push_back(y);
    }
    for (int i=1;i<=n;i++)
        if (!viz[i])
        dfs(i);
    for (int i=n;i>=1;i--)
        fout<<t[i]<<" ";
    return 0;
}

//Long long output!!!
//Check constraints!!!