CodeTON Round 1 (Div. 1 + Div. 2, Rated, Prizes!)
C
Make Equal With Mod
Codeforces
1200
原题
← BD →
翻译中…

You are given an array of $n$ non-negative integers $a_1, a_2, \ldots, a_n$. You can make the following operation: choose an integer $x \geq 2$ and replace each number of the array by the remainder when dividing that number by $x$, that is, for all $1 \leq i \leq n$ set $a_i$ to $a_i \bmod x$.

翻译中…

Determine if it is possible to make all the elements of the array equal by applying the operation zero or more times.

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Input

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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 an integer $n$ ($1 \leq n \leq 10^5$) — the length of the array.

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The second line of each test case contains $n$ integers $a_1, a_2, \ldots, a_n$ ($0 \leq a_i \leq 10^9$) where $a_i$ is the $i$-th element of the array.

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The sum of $n$ for all test cases is at most $2 \cdot 10^5$.

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Output

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For each test case, print a line with YES if you can make all elements of the list equal by applying the operation. 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

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In the first test case, one can apply the operation with $x = 3$ to obtain the array $[2, 2, 0, 2]$, and then apply the operation with $x = 2$ to obtain $[0, 0, 0, 0]$.

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In the second test case, all numbers are already equal.

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In the fourth test case, applying the operation with $x = 4$ results in the array $[1, 1, 1, 1]$.

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样例

Input #1
4
4
2 5 6 8
3
1 1 1
5
4 1 7 0 8
4
5 9 17 5
Output #1
YES
YES
NO
YES
InputCopy OutputCopy
题目信息
题号
1656C
时间限制
2 s
内存限制
256 MB
标签
构造
数学
数论
排序

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