#import math
import numba
@numba.jit  

def main():

    
    N =  int(input())
    
   # a = 13 + 120 * (10 ** (N - 1) - 1) 
   # print(int(a % 1000000007))

    


    






    '''
    num_list = [1]
    for i in range(N):
        num_list.append(3)
    '''
    
    
    num = 10 ** N
    for i in range(N):
        num += 3 * (10 ** (N - i -1 ) )
    
    print(num % 1000000007)







if __name__=="__main__":
    main()