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Cod sursa(job #782196)
#include<cstdio>
#include<cmath>
using namespace std;
long long factorial(int n)
{
return (n == 1 || n == 0) ? 1 : factorial(n - 1) * n;
}
int main()
{
freopen("kperm.in","r",stdin);
freopen("kperm.out","w",stdout);
int n,k,c,r,d;
long long rez=1,x,x1,a;
scanf("%d %d",&n,&k);
if(n%2==0)printf("0");
else
{
c=n/k;
r=n%k;
d=k-r;
rez=(factorial(r)%666013);
//printf("%lld",rez);
rez=((rez*factorial(d))%666013);
a=factorial(c+1);
x1=x=a%666013;
for(int i=1;i<r;++i)
x1=(x1*x)%666013;
rez=(rez*x1)%666013;
x1=x=(a/(c+1))%666013;
for(int i=1;i<d;++i)
x1=(x1*x)%666013;
rez=(rez*x1)%666013;
printf("%lld",rez);
}
return 0;
}