CodeTON Round 1 (Div. 1 + Div. 2, Rated, Prizes!)
B
Subtract Operation
Codeforces
1100
原题
← AC →
翻译中…

You are given a list of $n$ integers. You can perform the following operation: you choose an element $x$ from the list, erase $x$ from the list, and subtract the value of $x$ from all the remaining elements. Thus, in one operation, the length of the list is decreased by exactly $1$.

翻译中…

Given an integer $k$ ($k \gt 0$), find if there is some sequence of $n-1$ operations such that, after applying the operations, the only remaining element of the list is equal to $k$.

翻译中…

Input

翻译中…

The input consists of multiple test cases. The first line contains a single integer $t$ ($1 \leq t \leq 10^4$) — the number of test cases. Description of the test cases follows.

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The first line of each test case contains two integers $n$ and $k$ ($2 \leq n \leq 2\cdot 10^5$, $1 \leq k \leq 10^9$), the number of integers in the list, and the target value, respectively.

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The second line of each test case contains the $n$ integers of the list $a_1, a_2, \ldots, a_n$ ($-10^9 \leq a_i \leq 10^9$).

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It is guaranteed that the sum of $n$ over all test cases is not greater that $2 \cdot 10^5$.

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Output

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For each test case, print YES if you can achieve $k$ with a sequence of $n-1$ operations. Otherwise, print NO.

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You may print each letter in any case (for example, "YES", "Yes", "yes", "yEs" will all be recognized as a positive answer).

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Note

翻译中…

In the first example we have the list $\{4, 2, 2, 7\}$, and we have the target $k = 5$. One way to achieve it is the following: first we choose the third element, obtaining the list $\{2, 0, 5\}$. Next we choose the first element, obtaining the list $\{-2, 3\}$. Finally, we choose the first element, obtaining the list $\{5\}$.

翻译中…

样例

Input #1
4
4 5
4 2 2 7
5 4
1 9 1 3 4
2 17
17 0
2 17
18 18
Output #1
YES
NO
YES
NO
InputCopy OutputCopy
题目信息
题号
1656B
时间限制
1 s
内存限制
256 MB
标签
数据结构
贪心
数学
双指针

题面与样例版权归 Codeforces 及出题人所有;中文翻译由 AI 生成(CI 管线),如有出入请以原文为准。