#include <fstream>

using namespace std;
ifstream cin("sortaret.in");
ofstream cout("sortaret.out");
int vf[100005], urm[100005], lst[50005], q[50005], nrp[50005],nr,viz[50005],v[50005],k;
void adauga(int x, int y){
    vf[++nr]=y;
    urm[nr]=lst[x];
    lst[x]=nr;
}
void dfs(int x){
    viz[x]=true;
    int y;
    for(int p=lst[x];p!=0;p=urm[p]){
        y=vf[p];
        if(!viz[y]){
        dfs(y);
        }
    }
    v[++k]=x;
}
int main()
{
    int n,m,x,y;
    cin>>n>>m;
    for(int i=1;i<=m;i++){
        cin>>x>>y;
        adauga(x,y);
    }
    for(int i=1;i<=n;i++){
        if(viz[i]==0){
            dfs(i);
        }
    }
    for(int i=k;i>=1;i--){
        cout<<v[i]<<" ";
    }
    return 0;
}