#include<fstream>
#define DIM 50010
#include<vector>
using namespace std;
ifstream fin("sortaret.in");
ofstream fout("sortaret.out");
vector<int> L[DIM];
int viz[DIM],p[DIM],r[DIM],n,m,i,k,x,y;


void dfs(int x)
{

     viz[x]=1;
    for(int i=0;i<L[x].size();i++)
    {

        if(viz[L[x][i]]==0)
            dfs(L[x][i]);
    }
    p[++k]=x;
}

int main()
{
    fin>>n>>m;
    for(i=1;i<=m;i++){
        fin>>x>>y;
        L[x].push_back(y);
        r[y]=1;
    }
    for(i=1;i<=n;i++){
        if(r[i]==0)
            dfs(i);

    }
    for(i=n;i>=1;i--)
        fout<<p[i]<<" ";


    return 0;

}