#include <bits/stdc++.h>
#define NMAX 50005
using namespace std;
ifstream fin("sortaret.in");
ofstream fout("sortaret.out");

vector <int> v[NMAX];
int deg[NMAX];

int Q[NMAX];
int n,m,lg;
void topo()
{
    int x;
    for(int i=1;i<=n;++i)
        if(deg[i]==0) Q[++lg]=i;
    for(int i=1;i<=n;++i)
    {
        x=Q[i];
        for(auto y:v[x])
        {
            deg[y]--;
            if(deg[y]==0) Q[++lg]=y;
        }
    }
}

int main()
{
    int x,y;
    fin>>n>>m;
    for(int i=1;i<=m;++i)
    {
        fin>>x>>y;
        v[x].push_back(y);
        deg[y]++;
    }
    topo();
    for(int i=1;i<=n;++i)
        fout<<Q[i]<<" ";
    return 0;
}