#include <fstream>
#include <vector>
#include <queue>
#define pb push_back

using namespace std;
using vi=vector<int>;
using qi=queue<int>;

ifstream fin("sortaret.in");
ofstream fout("sortaret.out");

const int N=5e4+2;

int n,m,x,y,r[N],i;
vi v[N];
qi q;

int main()
{
    fin>>n>>m;
    for(i=1; i<=m; i++)
    {
        fin>>x>>y;
        v[x].pb(y);
        r[y]++;
    }

    for(i=1; i<=n; i++)
        if(!r[i])
            q.push(i);

    while(!q.empty())
    {
        x=q.front(); q.pop();
        fout<<x<<' ';
        for(auto i:v[x])
            if(!(--r[i]))
                q.push(i);
    }
    return 0;
}