Cod sursa(job #638328)

Utilizator andreea1coolBobu Andreea andreea1cool Data 20 noiembrie 2011 20:16:18
Problema Dirichlet Scor 0
Compilator cpp Status done
Runda .com 2011 Marime 0.35 kb
Raporteaza aceasta sursa 
#include<cstdio>
using namespace std;
long long n,i,au=1,j;
long long mod=9999991;

int main()
{
    freopen("dirichlet.in","r",stdin);
    freopen("dirichlet.out","w",stdout);
    scanf("%lld",&n);
    for(i=1;i<=n-1;i++)
        au=(au*3)%mod;
    au=(au-1)%mod;
    au=(au/2)%mod;
    au=(au+1)%mod;

    printf("%lld",au);
    return 0;
}