//#include <iostream>
#include <fstream>
#include <vector>
using namespace std;
vector<int> v[50005];
int q[50005],cnt,f[50005];
int main()
{
    ifstream cin("sortaret.in");
    ofstream cout("sortaret.out");
    int n,m,a,b;
    cin>>n>>m;
    for(int i=1;i<=m;i++){
        cin>>a>>b;
        v[a].push_back(b);
        f[b]++;
    }
    for(int i=1;i<=n;i++){
        if(f[i]==0){
            q[++cnt]=i;
        }
    }
    while(cnt!=0){
        int x=q[cnt--];
        cout<<x<<" ";
        for(auto u:v[x]){
            f[u]--;
            if(f[u]==0)
                q[++cnt]=u;
        }
    }
    return 0;
}