# 492. Construct the Rectangle

Easy
A web developer needs to know how to design a web page's size. So, given a specific rectangular web page’s area, your job by now is to design a rectangular web page, whose length L and width W satisfy the following requirements:
1. 1.
The area of the rectangular web page you designed must equal to the given target area.
2. 2.
The width `W` should not be larger than the length `L`, which means `L >= W`.
3. 3.
The difference between length `L` and width `W` should be as small as possible.
Return an array `[L, W]` where `L` and `W` are the length and width of the web page you designed in sequence.
Example 1:
Input: area = 4
Output: [2,2]
Explanation: The target area is 4, and all the possible ways to construct it are [1,4], [2,2], [4,1].
But according to requirement 2, [1,4] is illegal; according to requirement 3, [4,1] is not optimal compared to [2,2]. So the length L is 2, and the width W is 2.
Example 2:
Input: area = 37
Output: [37,1]
Example 3:
Input: area = 122122
Output: [427,286]
Constraints:
• `1 <= area <= 10^7`

### 解題

func constructRectangle(area int) []int {
for i:= int(math.Sqrt(float64(arcea))); i>=1; i-- {
if i * int(area/i) == area {
ans := []int{i, int(area/i)}
if ans > ans {
ans, ans = ans, ans
}
return ans
}
}
return []int{}
}