#include <stdio.h>
#include <stdlib.h>
#include <vector>
#define Nmax 50005

using namespace std;
vector <int> v[Nmax];
int viz[Nmax];
vector <int> ans;
void df(int x)
{
    for(int i=0;i<v[x].size();i++)
        if(viz[v[x][i]]==0)
            df(v[x][i]);
    viz[x]=1;
    ans.push_back(x);
}
int n,m;
int main()
{
    freopen("sortaret.in","r",stdin);
    freopen("sortaret.out","w",stdout);
    scanf("%d%d",&n,&m);
    for(int i=1;i<=m;i++)
    {
        int x,y;
        scanf("%d%d",&x,&y);
        v[x].push_back(y);
    }
    for(int i=1;i<=n;i++)
        if(viz[i]==0)
            df(i);

    for(int i=ans.size()-1;i>=0;i+=-1)
        printf("%d ",ans[i]);
    return 0;
}