#include <cstdio>
#include <vector>

using namespace std;

int grad[50010],rez[50010];
vector<int> v[50010];

int main()
{
    freopen("sortaret.in","r",stdin);
    freopen("sortaret.out","w",stdout);
    int n,m,x,y,l=0;
    scanf("%d%d",&n,&m);
    for(int i=1;i<=m;i++)
    {
        scanf("%d%d",&x,&y);
        v[x].push_back(y);
        grad[y]++;
    }
    for(int i=1;i<=n;i++)
        if(grad[i]==0) rez[++l]=i;
    for(int i=1;i<=l;i++)
        for(auto vec : v[rez[i]])
        {
            grad[vec]--;
            if(grad[vec]==0) rez[++l]=vec;
        }
    for(int i=1;i<=l;i++) printf("%d ",rez[i]);
    return 0;
}