#include <bits/stdc++.h>
# define MAXN 50001
using namespace std;

ifstream f("sortaret.in");
ofstream g("sortaret.out");

vector<int> G[MAXN];
bool viz[MAXN];
int n,m,k,v[MAXN];

void dfs(int nod)
{
    viz[nod] = 1;
    for(int i=0; i<G[nod].size(); i++)
      if(!viz[G[nod][i]]) dfs(G[nod][i]);
    v[++k] = nod;
}

int main()
{
    f>>n>>m;
    for(int i=1;i<=m;i++)
    {
        int x,y;
        f>>x>>y;
        G[x].push_back(y);
    }

    for(int i=1;i<=n;i++)
        if(!viz[i]) dfs(i);
    for(int i=n; i>=1; i--)
       g <<v[i]<<" ";
    return 0;
}