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Cod sursa(job #636579)
#include <cstdio>
#define Mod 9999991
#define NMax 1000005
using namespace std;
long long N, DP[NMax];
int main()
{
freopen ("dirichlet.in", "r", stdin);
freopen ("dirichlet.out", "w", stdout);
scanf ("%d", &N);
int Two=2;
DP[0]=1;
for (int i=1; i<=N; ++i, Two*=2, Two%=Mod)
{
DP[i]=i+Two-1;
DP[i]%=Mod;
}
printf ("%d\n", DP[N-1]);
return 0;
}