Codeforces Round 890 (Div. 2) supported by Constructor Institute
B
Good Arrays
Codeforces
900
原题
← AC →
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You are given an array of positive integers $a$ of length $n$.

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Let's call an array of positive integers $b$ of length $n$ good if:

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  1. $a_i \neq b_i$ for all $i$ from $1$ to $n$,
  2. $a_1 + a_2 +\ldots + a_n = b_1 + b_2 + \ldots + b_n$.
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Does a good array exist?

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Input

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

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The first line of each test case contains a single integer $n$ ($1 \le n \le 10^5$) — the length of the array $a$.

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The second line of each test case contains $n$ integers $a_1, a_2, \dots, a_n$ ($1 \le a_i \le 10 ^ 9$) — the elements of the array $a$.

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It is guaranteed that the sum of $n$ over all test cases does not exceed $10^5$.

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Output

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For each test case, output "YES" (without quotes) if there exists a good array, and "NO" (without quotes) otherwise.

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You can output the answer in any case (upper or lower). For example, the strings "yEs","yes", "Yes", and "YES" will be recognized as positive responses.

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Note

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In the first test case, a possible good array is $[3, 3, 3]$. Some examples of not good arrays are:

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  • $[8, 0, 1]$ — the array does not consist of only positive integers,
  • $[5, 2, 4]$ — the array does not have the same sum as the given array,
  • $[5, 2, 2]$ — the third element is equal to the third element of the given array.
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In the second test case, $[1, 1]$ is the only array of positive integers of length $2$ that has the sum of it's elements equal to $2$. Since $[1, 1]$ is not a good array, the answer is "NO".

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样例

Input #1
6
3
6 1 2
2
1 1
4
3 1 2 4
1
17
5
1 2 1 1 1
3
618343152 819343431 1000000000
Output #1
YES
NO
YES
NO
NO
YES
InputCopy OutputCopy
题目信息
题号
1856B
时间限制
1 s
内存限制
256 MB
标签
模拟
数学

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