LeetCode1051（C＃）

subject

The school plans to take an annual commemorative photo for all the students . According to the requirements , Students need to follow The decreasing Line up in order of height .

The sorted height is an integer array expected Express , among expected[i] It's expected to be number... In this line i The height of a student （ Subscript from 0 Start ）.

Give you an array of integers heights , Express Current student position The height of .heights[i] It's the... In this line i The height of a student （ Subscript from 0 Start ）.

Return to satisfaction heights[i] != expected[i] Of Subscript quantity .

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Example 1：
Input ：heights = [1,1,4,2,1,3]
Output ：3

explain ：
Height ：[1,1,4,2,1,3]
expect ：[1,1,1,2,3,4]
Subscript 2 、4 、5 The height of the students at does not match .

Example 2：
Input ：heights = [5,1,2,3,4]
Output ：5

explain ：
Height ：[5,1,2,3,4]
expect ：[1,2,3,4,5]
The corresponding student heights of all subscripts do not match .

Example 3：
Input ：heights = [1,2,3,4,5]
Output ：0

explain ：
Height ：[1,2,3,4,5]
expect ：[1,2,3,4,5]
The corresponding student heights of all subscripts match .

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Code

• Linq One sentence sweeping the world

public class Solution 
{
    
    public int HeightChecker(int[] heights) 
    {
    
        return heights.OrderBy(h => h).
        Zip(heights, (e,h) => (first : e, second : h)).
        Count(eh => eh.first != eh.second);
    }
}