Cod sursa(job #637751)
Utilizator | Ana Rogoz anarogoz | Data | 20 noiembrie 2011 16:24:23 |
---|---|---|---|
Problema | Dirichlet | Scor | 4 |
Compilator | cpp | Status | done |
Runda | .com 2011 | Marime | 0.4 kb |
#include<stdio.h>
int main()
{
freopen("dirichlet.in","r",stdin);
freopen("dirichlet.out","w",stdout);
long long n,i,nn_fact,rez,n_fact,comb,j;
scanf("%lld",&n);
nn_fact=n_fact=1;
for(i=2;i<=2*n;i++)
nn_fact=(nn_fact*i)%9999991;
for(i=2;i<=n;i++)
n_fact=(n_fact*i)%9999991;
n_fact=(n_fact*n_fact)%9999991;
comb=nn_fact/n_fact;
rez=comb/(n+1);
printf("%lld\n",rez);
return 0;
}