Special Array With X Elements Greater Than or Equal X (Go)

On May 27 2024, I encountered a daily Leetcode challenge entitled

Special Array With X Elements Greater Than or Equal X

This challenge is relatively easy and quite friendly for beginners to practice. Because I'm learning Golang, I implemented it using that language.

For the question link, you can go to the following page.

Solution

First of all, let's define the function.

func specialArray(nums []int) int {

}

Then, initiate the loop and associated dependent variables such as x and count into the function.

func specialArray(nums []int) int {
    for i := 1; i <= len(nums); i++ {
        x := i
        count := 0
    }
}

Next, loop back over the nums array to compare whether each element is greater than x, if yes, add it to the count variable.

for _, v := range nums {
    if v >= x {
        count++
    }
}

Finally, check whether count is the same as x, if it is, immediately return x. However, if not, at the end of the function add return -1.

if count == x {
    return x
}

Complete code:

func specialArray(nums []int) int {
    for i := 1; i <= len(nums); i++ {
        x := i
        count := 0

        for _, v := range nums {
            if v >= x {
                count++
            }
        }

        if count == x {
            return x
        }
    }

    return -1
}