#include <bits/stdc++.h>
#define ll long long int
#define double long double
#define pb push_back
#define endl '\n'
#define er erase
#define sz size
#define in insert
#define mp make_pair
#define f first
#define s second
#define mod 1000000007
using namespace std;

ll n, m, b[50005];
vector<ll> vec[50005], ans;

void DFS(ll s)
{
    b[s]=1;
    ans.pb(s);
    for(long long unsigned i=0;i<vec[s].sz();i++)
    {
        if(b[vec[s][i]]==0) DFS(vec[s][i]);
    }
}

int main(){
    ifstream fin("sortaret.in");
    ofstream fout("sortaret.out");
    fin>>n>>m;
    for(ll i=1;i<=m;i++)
    {
        ll x, y;
        fin>>x>>y;
        vec[x].pb(y);
    }
    for(ll i=1;i<=n;i++)
    {
        if(b[i]==0) DFS(i);
    }
    for(ll i=0;i<ans.sz();i++)
        fout<<ans[i]<<' ';
    return 0;
}