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: Wrong Answer)

using System;
using System.Linq;

namespace M_solutions2020
{
    class Program
    {
        static void Main(string[] args)
        {
            c();
        }

        public static void c()
        {
            long[] nk = Console.ReadLine().Split(' ').Select(long.Parse).ToArray();
            long n = nk[0], k = nk[1];
            long[] a = Console.ReadLine().Split(' ').Select(long.Parse).ToArray();
            long sum = 1;
            for(long i = 0; i < k; i++)
            { sum *= a[i]; }
            for(long i = k; i < n ; i++)
            {
                long j = k;
                long sum1 = 0;
                if (a[i - j] == 0)
                { sum1 = 0; }
                else
                { sum1 = sum / a[i - j]; }
                sum1 *= a[i];
                if(sum1 > sum)
                { Console.WriteLine("Yes"); }
                else
                { Console.WriteLine("No"); }
                sum = sum1;
            }
        }
    }
}