SANVI - Sanvi and Magical Numbers
Let us define a Magical number as a positive integer number which meets the following criteria on its representation:
1.) It does not contain any zeros. 2.) Each digits may appears at most twice in it. 3.) The absolute differences between summation of count of non-prime digits and count of prime-digits do not exceed K.
Sanvi likes numbers which are not prime. So, she wants to allow at most M non prime numbers to violate the rule number-2 . Sanvi also uses following algorithm in rule number-3 to calculate count of each digit d in a number:
count( d ) = min( total occurrences of d in number, 2 )
You are given an integer number N. Your task is to find the total Magical numbers in the range from 1 to N following Sanvi's command. Since the answer could be very large, print it modulo 10^9+7.
Input contains several test cases up to EOF (End Of File), which contains three space separated integers N ( 1 ≤ N ≤ 10^18 ) , K( 0≤ K≤ 18 ) and M( 0 ≤ M ≤ 5 ) as described in the problem statement.Total test cases will not exceed 5.
Output a single integer denoting the total Magical numbers from 1 to N following Sanvi's command . Since the answer could be very large print it modulo 10^9+7.
10 1 0
5 3 2
Please read the problem statement again. I think problem is easy to understand.