codeforces#P1878A. How Much Does Daytona Cost?
How Much Does Daytona Cost?
Description
We define an integer to be the most common on a subsegment, if its number of occurrences on that subsegment is larger than the number of occurrences of any other integer in that subsegment. A subsegment of an array is a consecutive segment of elements in the array $a$.
Given an array $a$ of size $n$, and an integer $k$, determine if there exists a non-empty subsegment of $a$ where $k$ is the most common element.
Each test consists of multiple test cases. The first line contains a single integer $t$ ($1 \le t \le 1000$) — the number of test cases. The description of test cases follows.
The first line of each test case contains two integers $n$ and $k$ ($1 \le n \le 100$, $1 \le k \le 100$) — the number of elements in array and the element which must be the most common.
The second line of each test case contains $n$ integers $a_1$, $a_2$, $a_3$, $\dots$, $a_n$ ($1 \le a_i \le 100$) — elements of the array.
For each test case output "YES" if there exists a subsegment in which $k$ is the most common element, and "NO" otherwise.
You can output the answer in any case (for example, the strings "yEs", "yes", "Yes", and "YES" will be recognized as a positive answer).
Input
Each test consists of multiple test cases. The first line contains a single integer $t$ ($1 \le t \le 1000$) — the number of test cases. The description of test cases follows.
The first line of each test case contains two integers $n$ and $k$ ($1 \le n \le 100$, $1 \le k \le 100$) — the number of elements in array and the element which must be the most common.
The second line of each test case contains $n$ integers $a_1$, $a_2$, $a_3$, $\dots$, $a_n$ ($1 \le a_i \le 100$) — elements of the array.
Output
For each test case output "YES" if there exists a subsegment in which $k$ is the most common element, and "NO" otherwise.
You can output the answer in any case (for example, the strings "yEs", "yes", "Yes", and "YES" will be recognized as a positive answer).
7
5 4
1 4 3 4 1
4 1
2 3 4 4
5 6
43 5 60 4 2
2 5
1 5
4 1
5 3 3 1
1 3
3
5 3
3 4 1 5 5
YES
NO
NO
YES
YES
YES
YES
Note
In the first test case we need to check if there is a subsegment where the most common element is $4$.
On the subsegment $[2,5]$ the elements are $4, \ 3, \ 4, \ 1$.
- $4$ appears $2$ times;
- $1$ appears $1$ time;
- $3$ appears $1$ time.
This means that $4$ is the most common element on the subsegment $[2, 5]$, so there exists a subsegment where $4$ is the most common element.