Question

How to find the next sparse number which greater than or equal to a given number in C#

Answer 1

// If there are no two consecutive 1s in a number binary representation, 
// it is Sparse. 5 (101) is sparse, 6 (110) is not. 
 
using System;
 
class Program
{
    public static bool is_sparse(int n) { 
        int result = n & (n >> 1);
            
        if (result == 0)
          return true;
            
        return false;
    }
    public static int next_sparse(int number) {
        while (true) {
            if (is_sparse(number)) {
                return number;
            }
            number++;
        }
    }
    static void Main() {
        Console.WriteLine(next_sparse(6));
        Console.WriteLine(next_sparse(5));
        Console.WriteLine(next_sparse(38));
        Console.WriteLine(next_sparse(305));
    }
}
 
 
 
 
/*
run:
    
8
5
40
320
    
*/

 

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