A11377 | Find Extra One
时间限制1s
内存限制256MB
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题目描述
You have $n$ distinct points on a plane, none of them lie on $OY$ axis. Check that there is a point after removal of which the remaining points are located on one side of the $OY$ axis.
输入格式
The first line contains a single positive integer $n$ ( $2<=n<=10^{5}$ ).
The following $n$ lines contain coordinates of the points. The $i$ -th of these lines contains two single integers $x_{i}$ and $y_{i}$ ( $|x_{i}|,|y_{i}|<=10^{9}$ , $x_{i}≠0$ ). No two points coincide.
The following $n$ lines contain coordinates of the points. The $i$ -th of these lines contains two single integers $x_{i}$ and $y_{i}$ ( $|x_{i}|,|y_{i}|<=10^{9}$ , $x_{i}≠0$ ). No two points coincide.
输出格式
Print "Yes" if there is such a point, "No" — otherwise.
You can print every letter in any case (upper or lower).
You can print every letter in any case (upper or lower).
输入输出样例
输入 #1
3 1 1 -1 -1 2 -1
输出 #1
Yes
输入 #2
4 1 1 2 2 -1 1 -2 2
输出 #2
No
输入 #3
3 1 2 2 1 4 60
输出 #3
Yes
In the first example the second point can be removed.
In the second example there is no suitable for the condition point.
In the third example any point can be removed.
In the second example there is no suitable for the condition point.
In the third example any point can be removed.
C++ 编辑器
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评测结果：Accepted