#include <bits/stdc++.h>
#define pb push_back
using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out");
const int dim=5e4+10;
typedef long long ll;
typedef pair<int,int> pi;
int t,T,n,m,a,b;

vector < int > V[dim],viz(dim,0),A;

void DFS(int nod)
{
    viz[nod]=1;
    for(unsigned int vecin:V[nod])
    {
        if(!viz[vecin])
            DFS(vecin);
    }
    viz[nod]=2;
    A.pb(nod);
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    f>>n>>m;
    for(int i=1;i<=m;i++)
    {
        f>>a>>b;
        V[a].pb(b);
    }
    for(int i=1;i<=n;i++)
    if(!viz[i]) DFS(i);
    reverse(A.begin(),A.end());
    for(unsigned int x:A)
        g<<x<<' ';

    return 0;
}