#include<stdio.h>
#include<vector>
#define Nmx 50005

using namespace std;
int n,m,grd[Nmx],Q[Nmx],nr;
vector<int> G[Nmx];

void citire()
{
    int x,y;
    scanf("%d%d",&n,&m);
    for(int i=1;i<=m;++i)
    {
        scanf("%d%d",&x,&y);
        G[x].push_back(y);
        grd[y]++;
    }
}

void solve()
{
    for(int i=1;i<=n;++i)
        if(grd[i]==0)
            Q[++nr]=i;
    for(int j=1;j<=nr;++j)
    {
        for(int i=0;i<G[Q[j]].size();++i)
        {
            grd[G[Q[j]][i]]--;
            if(grd[G[Q[j]][i]]==0)
                Q[++nr]=G[Q[j]][i];
        }
    }
    for(int i=1;i<=nr;++i)
        printf("%d ",Q[i]);
    printf("\n");
}

int main()
{
    freopen("sortaret.in","r",stdin);
    freopen("sortaret.out","w",stdout);
    citire();
    solve();
    return 0;
}