Problem:
Score: 300 points

Problem Statement

M-kun is a student in Aoki High School, where a year is divided into N terms.

There is an exam at the end of each term. According to the scores in those exams, a student is given a grade for each term, as follows:

For the first through (K-1)-th terms: not given.

For each of the K-th through N-th terms: the multiplication of the scores in the last K exams, including the exam in the graded term.

M-kun scored A_i in the exam at the end of the i-th term.

For each i such that K+1 \leq i \leq N, determine whether his grade for the i-th term is strictly greater than the grade for the (i-1)-th term.

Constraints

2 \leq N \leq 200000

1 \leq K \leq N-1

1 \leq A_i \leq 10^{9}

All values in input are integers.

Input

Input is given from Standard Input in the following format:

N K
A_1 A_2 A_3 \ldots A_N

Output

Print the answer in N-K lines.

The i-th line should contain Yes if the grade for the (K+i)-th term is greater than the grade for the (K+i-1)-th term, and No otherwise.

Sample Input 1

5 3
96 98 95 100 20

Sample Output 1

Yes
No

His grade for each term is computed as follows:

3-rd term: (96 \times 98 \times 95) = 893760

4-th term: (98 \times 95 \times 100) = 931000

5-th term: (95 \times 100 \times 20) = 190000

Sample Input 2

3 2
1001 869120 1001

Sample Output 2

No

Note that the output should be No if the grade for the 3-rd term is equal to the grade for the 2-nd term.

Sample Input 3

15 7
3 1 4 1 5 9 2 6 5 3 5 8 9 7 9

Sample Output 3

Yes
Yes
No
Yes
Yes
No
Yes
Yes

Solution in C# (.NET Core 3.1.201) (judge verdict: Accepted)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
  class Program
  {
    static void Main(string[] args)
    {
      string line = Console.ReadLine();
      string[] split = line.Split(' ');
      int n = Int32.Parse(split[0]);
      int k = Int32.Parse(split[1]);

      int[] ai = new int[200000];
      line = Console.ReadLine();
      split = line.Split(' ');
      for (int i = 0; i < n; ++i) {
        ai[i] = Int32.Parse(split[i]);
      }

      int ak = 1;
      for (int i = 0; i < k; ++i) {
        ak *= ai[i];
      }

      for (int testnum = k; testnum < n; testnum++)
      {
        if (ai[testnum - k] < ai[testnum]) Console.WriteLine("Yes");
        else Console.WriteLine("No");

      }

      int a = 0;
    }
  }
	class list{
		public int juni;
		public int old;
		public list(int juni, int old){
			this.juni = juni;
			this.old = old;
		}
	}
}