#include <fstream>
#include <vector>
#include <queue>

#define nMax 50001
#define pb push_back

using namespace std;

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

int n, m, S, nrSol;
int gradIn[nMax], viz[nMax], Sol[nMax];
vector<int> G[nMax];
queue<int> Q;

void solve()
{
    for(int i=1; i<=n; i++)
        if(gradIn[i]==0)
            Q.push(i);

    while(!Q.empty())
    {
        int node=Q.front();
        Q.pop();
        for(vector<int>::iterator it=G[node].begin(); it!=G[node].end(); it++)
        {
            int fiu=*it;
            gradIn[fiu]--;
            if(gradIn[fiu]==0)
                Q.push(fiu);
        }
        fout<<node<<" ";
    }
}

int main()
{
    int a, b;
    fin>>n>>m;

    for(int i=1; i<=m; i++)
    {
        fin>>a>>b;
        G[a].pb(b);
        gradIn[b]++;
    }

    solve();
}