Leetcode - Height Checker
https://leetcode.com/problems/height-checker/
Students are asked to stand in non-decreasing order of heights for an annual photo.
Return the minimum number of students that must move in order for all students to be standing in non-decreasing order of height.
Notice that when a group of students is selected they can reorder in any possible way between themselves and the non selected students remain on their seats.
Example 1:
Input: heights = [1,1,4,2,1,3] Output: 3 Explanation: Current array : [1,1,4,2,1,3] Target array : [1,1,1,2,3,4] On index 2 (0-based) we have 4 vs 1 so we have to move this student. On index 4 (0-based) we have 1 vs 3 so we have to move this student. On index 5 (0-based) we have 3 vs 4 so we have to move this student.
func heightChecker(heights []int) int {
originHeights := make([]int, len(heights))
for index, item := range heights {
originHeights[index] = item
}
sort.Ints(heights)
count := 0
for i := 0; i < len(heights); i++ {
if originHeights[i] != heights[i] {
count++
}
}
return count
}
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