#include <cstdio>
#include <vector>

using namespace std;

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

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