spoorthybalaji/Hacker

Hacker

import java.util.Scanner;

class Hacker { public static void main(String args[] ) throws Exception { try(Scanner sc = new Scanner(System.in)) { int N = sc.nextInt(); int K = sc.nextInt(); int[] input = new int[N];

        for(int i = 0; i < N; ++i) 
        {
            switch (s.next().charAt(0))
            {
                case 'G': input[i] = 0; 
                         break;
                case 'R': input[i] = 1; 
                         break;
                case 'Y': input[i] = 2;
                          break;
            }
        }

        int[] temp = new int[N];
        int offset = 0, result = 0;

        for(int i = 0; i < N; ++i)
        {
            input[i] += offset;

            switch (input[i] % 3) {
                case 1: temp[i] = 2;
                        result += 2;
                      offset += 2;
                       break;
                case 2: temp[i] = 1;
                       result += 1; offset += 1;
                       break;
                default: temp[i] = 0; 
                   break;
            }

            if ((i+1)-K >= 0) offset -= temp[i+1-K];
        }
        System.out.println(result);
    }
}

}