题库练习 Minimum Sum
← 上一题 下一题 →

A8347 | Minimum Sum

时间限制1s
内存限制256MB
通过 / 提交0/0

题目描述

You are given a set of $n$ vectors on a plane. For each vector you are allowed to multiply any of its coordinates by -1. Thus, each vector $v_{i}=(x_{i},y_{i})$ can be transformed into one of the following four vectors:

- $v_{i}^{1}=(x_{i},y_{i})$ ,
- $v_{i}^{2}=(-x_{i},y_{i})$ ,
- $v_{i}^{3}=(x_{i},-y_{i})$ ,
- $v_{i}^{4}=(-x_{i},-y_{i})$ .

You should find two vectors from the set and determine which of their coordinates should be multiplied by -1 so that the absolute value of the sum of the resulting vectors was minimally possible. More formally, you should choose two vectors $v_{i}$ , $v_{j}$ ( $1<=i,j<=n,i≠j$ ) and two numbers $k_{1}$ , $k_{2}$ ( $1<=k_{1},k_{2}<=4$ ), so that the value of the expression $|v_{i}^{k_{1}}+v_{j}^{k_{2}}|$ were minimum.

输入格式

The first line contains a single integer $n$ ( $2<=n<=10^{5}$ ). Then $n$ lines contain vectors as pairs of integers " $x_{i}$ $y_{i}$ " ( $-10000<=x_{i},y_{i}<=10000$ ), one pair per line.

输出格式

Print on the first line four space-separated numbers " $i$ $k_{1}$ $j$ $k_{2}$ " — the answer to the problem. If there are several variants the absolute value of whose sums is minimum, you can print any of them.

输入输出样例

输入 #1
5
-7 -3
9 0
-8 6
7 -8
4 -5
输出 #1
3 2 4 2
输入 #2
5
3 2
-4 7
-6 0
-8 4
5 1
输出 #2
3 4 5 4
C++ 编辑器
输入
输出