#include <bits/stdc++.h>
#define nMax 400005

using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out");
int n,m,x,y,viz[50005];
vector <int> v[50005];
void dfs(int nod)
{viz[nod]=1;
    g<<nod<<" ";
    for(int i=0;i<v[nod].size();i++)
    {
        if(viz[v[nod][i]]==0) {dfs(v[nod][i]);}
    }
}
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]==0) dfs(i);
    }

}