A11230 | Circle of Numbers
时间限制1s
内存限制256MB
通过 / 提交0/0
题目描述
$n$ evenly spaced points have been marked around the edge of a circle. There is a number written at each point. You choose a positive real number $k$ . Then you may repeatedly select a set of $2$ or more points which are evenly spaced, and either increase all numbers at points in the set by $k$ or decrease all numbers at points in the set by $k$ . You would like to eventually end up with all numbers equal to $0$ . Is it possible?
A set of $2$ points is considered evenly spaced if they are diametrically opposed, and a set of $3$ or more points is considered evenly spaced if they form a regular polygon.
A set of $2$ points is considered evenly spaced if they are diametrically opposed, and a set of $3$ or more points is considered evenly spaced if they form a regular polygon.
输入格式
The first line of input contains an integer $n$ ( $3<=n<=100000$ ), the number of points along the circle.
The following line contains a string $s$ with exactly $n$ digits, indicating the numbers initially present at each of the points, in clockwise order.
The following line contains a string $s$ with exactly $n$ digits, indicating the numbers initially present at each of the points, in clockwise order.
输出格式
Print "YES" (without quotes) if there is some sequence of operations that results in all numbers being $0$ , otherwise "NO" (without quotes).
You can print each letter in any case (upper or lower).
You can print each letter in any case (upper or lower).
输入输出样例
输入 #1
30 000100000100000110000000001100
输出 #1
YES
输入 #2
6 314159
输出 #2
NO
If we label the points from $1$ to $n$ , then for the first test case we can set $k=1$ . Then we increase the numbers at points $7$ and $22$ by $1$ , then decrease the numbers at points $7$ , $17$ , and $27$ by $1$ , then decrease the numbers at points $4$ , $10$ , $16$ , $22$ , and $28$ by $1$ .
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