Cod sursa(job #638304)
Utilizator | Data | 20 noiembrie 2011 20:08:01 | |
---|---|---|---|
Problema | Dirichlet | Scor | 0 |
Compilator | cpp | Status | done |
Runda | .com 2011 | Marime | 0.35 kb |
#include<cstdio>
using namespace std;
int n,i,rez=1,au=1,j;
int mod=9999991;
int main()
{
freopen("dirichlet.in","r",stdin);
freopen("dirichlet.out","w",stdout);
scanf("%d",&n);
for(i=1;i<=n-1;i++)
au=(au*3)%mod;
au=((au-1)%mod-1)/2+1;
if(n!=1)
rez=(rez+au)%mod;
printf("%d",rez);
return 0;
}