#include<bits/stdc++.h>
using namespace std;
#define rc(x) return cout<<x<<endl,0
#define pb push_back
#define dbg(x) cout << #x << '=' << x << '\n';
#define ll long long
#define int ll
#define sz size()
#define x first
#define y second
#define pd pair <long double, long double>
#define pii pair <pi, pi>
#define vi vector <int>
const ll mod = 1e9 + 7;
const ll nmax=5e4+2;
int n, m, color[100002];
bool ctrl=1;
vector <int> g[50001];
vector <int> ans;

int dfs(int node){
    color[node]=1;
    for(int i: g[node]){
        if(color[i]==0){
            dfs(i);
        }
        else if(color[i]==1) ctrl=0;
    }
    color[node]=2;
    ans.pb(node);
}

int32_t main(){
    ios_base :: sync_with_stdio(0); cin.tie(); cout.tie();
    ifstream cin("sortaret.in");
    ofstream cout("sortaret.out");
    cin>>n>>m;
    for(int i=1; i<=m; i++){
        int x, y;
        cin>>x>>y;
        g[x].pb(y);
    }
    for(int i=1; i<=n; i++){
        if(color[i]==0) dfs(i);
    }
    //if(ctrl==0) cout<<"xd";
    reverse(ans.begin(), ans.end());
    for(int i: ans) cout<<i<<" ";
}