#include <bits/stdc++.h>

#define MAX 50005
using namespace std;
ifstream in("sortaret.in");
ofstream out("sortaret.out");

int N,M;
vector<int> A[MAX];
vector<int> S;
bool viz[MAX];

void citire()
{   int x,y;
    in>>N>>M;
    while(M--)
    {
        in>>x>>y;
        A[x].push_back(y);
    }
}
void DFS(int nod)
{
    viz[nod]=1;
    for(int i=0;i<A[nod].size();i++)
        if(!viz[A[nod][i]])
        DFS(A[nod][i]);
    S.push_back(nod);
}
int main()
{citire();
for(int i=1;i<=N;i++)
    if(!viz[i])
    DFS(i);

    for(int i=S.size()-1;i>=0;i--)
        out<<S[i]<<" ";

}