#include <iostream>
#include <fstream>
#include <vector>
using namespace std;
ifstream fin ("sortaret.in");
ofstream fout ("sortaret.out");
vector<int>v[50001];
int n,m,a,b,f[50001],q[50001],nr;
void dfs(int val)
{
    f[val]=1;
    for (int i=v[val].size()-1;i>=0;i--)
         if (f[v[val][i]]==0) dfs(v[val][i]);
    nr++;q[nr]=val;
}
int main()
{
    fin >>n>>m;
    for (int i=1;i<=m;i++)
        {fin >>a>>b;
         v[a].push_back(b);}
    for (int i=1;i<=n;i++)
        {if (f[i]==0) {dfs(i);}}
    for (int i=nr;i>=1;i--)
        {fout <<q[i]<<' ';}
    return 0;
}