A13885 | Array Partition
时间限制1s
内存限制256MB
通过 / 提交0/0
题目描述
You are given an array $a$ consisting of $n$ integers.
Let $min(l, r)$ be the minimum value among $a_l, a_{l + 1}, \ldots, a_r$ and $max(l, r)$ be the maximum value among $a_l, a_{l + 1}, \ldots, a_r$ .
Your task is to choose three positive (greater than $0$ ) integers $x$ , $y$ and $z$ such that:
- $x + y + z = n$ ;
- $max(1, x) = min(x + 1, x + y) = max(x + y + 1, n)$ .
In other words, you have to split the array $a$ into three consecutive non-empty parts that cover the whole array and the maximum in the first part equals the minimum in the second part and equals the maximum in the third part (or determine it is impossible to find such a partition).
Among all such triples (partitions), you can choose any.
You have to answer $t$ independent test cases.
Let $min(l, r)$ be the minimum value among $a_l, a_{l + 1}, \ldots, a_r$ and $max(l, r)$ be the maximum value among $a_l, a_{l + 1}, \ldots, a_r$ .
Your task is to choose three positive (greater than $0$ ) integers $x$ , $y$ and $z$ such that:
- $x + y + z = n$ ;
- $max(1, x) = min(x + 1, x + y) = max(x + y + 1, n)$ .
In other words, you have to split the array $a$ into three consecutive non-empty parts that cover the whole array and the maximum in the first part equals the minimum in the second part and equals the maximum in the third part (or determine it is impossible to find such a partition).
Among all such triples (partitions), you can choose any.
You have to answer $t$ independent test cases.
输入格式
The first line of the input contains one integer $t$ ( $1 \le t \le 2 \cdot 10^4$ ) — the number of test cases. Then $t$ test cases follow.
The first line of the test case contains one integer $n$ ( $3 \le n \le 2 \cdot 10^5$ ) — the length of $a$ .
The second line of the test case contains $n$ integers $a_1, a_2, \ldots, a_n$ ( $1 \le a_i \le 10^9$ ), where $a_i$ is the $i$ -th element of $a$ .
It is guaranteed that the sum of $n$ does not exceed $2 \cdot 10^5$ ( $\sum n \le 2 \cdot 10^5$ ).
The first line of the test case contains one integer $n$ ( $3 \le n \le 2 \cdot 10^5$ ) — the length of $a$ .
The second line of the test case contains $n$ integers $a_1, a_2, \ldots, a_n$ ( $1 \le a_i \le 10^9$ ), where $a_i$ is the $i$ -th element of $a$ .
It is guaranteed that the sum of $n$ does not exceed $2 \cdot 10^5$ ( $\sum n \le 2 \cdot 10^5$ ).
输出格式
For each test case, print the answer: NO in the only line if there is no such partition of $a$ that satisfies the conditions from the problem statement. Otherwise, print YES in the first line and three integers $x$ , $y$ and $z$ ( $x + y + z = n$ ) in the second line.
If there are several answers, you can print any.
If there are several answers, you can print any.
输入输出样例
输入 #1
6 11 1 2 3 3 3 4 4 3 4 2 1 8 2 9 1 7 3 9 4 1 9 2 1 4 2 4 3 3 1 2 7 4 2 1 1 4 1 4 5 1 1 1 1 1 7 4 3 4 3 3 3 4
输出 #1
YES 6 1 4 NO YES 2 5 2 YES 4 1 2 YES 1 1 3 YES 2 1 4
暂无题解
C++ 编辑器
输入
输出
可保存默认模板;新题优先使用已保存模板。
当前快捷键仅展示,暂不支持修改。
- 撤销
Ctrl / ⌘ + Z - 重做
Ctrl / ⌘ + Y - 查找
Ctrl / ⌘ + F - 全选
Ctrl / ⌘ + A - 复制
Ctrl / ⌘ + C - 剪切
Ctrl / ⌘ + X - 粘贴
Ctrl / ⌘ + V - 自动排版
工具栏排版按钮 - 草稿保存
编辑时自动保存到本机
历史
提交记录
状态说明时间源码
AI
作答助手
你好,我是作答助手。可以问思路、复杂度、样例含义或代码报错原因;不会直接给出完整 AC 代码。
确定要清空代码吗?
提交通过
评测结果:Accepted