Cod sursa(job #1805303)
Utilizator | Data | 13 noiembrie 2016 17:19:10 | |
---|---|---|---|
Problema | Kperm | Scor | 100 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.49 kb |
#include <fstream>
using namespace std;
long long t,n,k,ans,i,v[5001],nr[5000];
int main()
{
ifstream f("kperm.in");
ofstream g("kperm.out");
f>>n>>k;
v[0]=1;
t=666013;
for(i=1; i<=n; i++)
{
nr[i%k]++;
v[i]=(v[i-1]*i)%t;
}
ans=(v[n%k]*v[k-n%k])%t;
for(i=0; i<k; i++)
{
ans=(ans*v[nr[i]])%t;
}
if(k%2==0)
{
ans=0;
}
g<<ans<<'\n';
f.close(); g.close();
return 0;
}