Only change 3 lines but doesn't provide all languages. So if you make a new solution from scratch, your solution always fails due to creating more than 3 lines of code.

Python 3 (comments on changed lines)

def findZigZagSequence(a, n):
    a.sort()
    mid = int((n + 1)/2) - 1 #Used as index, so -1
    a[mid], a[n-1] = a[n-1], a[mid]

    st = mid + 1
    ed = n - 2 #The last element is already in place, thus n-2
    while(st <= ed):
        a[st], a[ed] = a[ed], a[st]
        st = st + 1
        ed = ed - 1 #Decreasing

    for i in range (n):
        if i == n-1:
            print(a[i])
        else:
            print(a[i], end = ' ')
    return

test_cases = int(input())
for cs in range (test_cases):
    n = int(input())
    a = list(map(int, input().split()))
    findZigZagSequence(a, n)

i have made my solution in c and it's workig with the exact output when debuging on codeblocks but when submitting it on the site it gives me wrong answer

Although the expected output is matching with my output it's not passing. def findZigZagSequence(a, n): a.sort()#Sorting the array mid = int(n/2)#Finding the middle element a[mid], a[n-1] = a[n-1], a[mid] #Swapping the middle element with the max number #print(a) st = mid + 1 ed = n - 2 while(st <= ed): a[st], a[ed] = a[ed], a[st] st = st + 1 ed = ed - 1

for i in range (n):
    if i == n-1:
        print(a[i])
    else:
        print(a[i], end = ' ')
return

test_cases = int(input()) for cs in range (test_cases): n = int(input()) a = list(map(int, input().split())) findZigZagSequence(a, n)

I am not sure how to make this 3 lines or less in JS and there is no findZigZagSequence function to debug, but here's my solution (which isn't passing despite the output matching what is expected 🤔) I feel like this is fairly sloppy though.

function processData(input) {
    const modifiedInput = input.split('\n')
    const middlePosition = Math.floor(modifiedInput[1] / 2)
    const sortedArr = modifiedInput[2].split(' ').sort((a,b) => a-b)
    const middleNumber = sortedArr.pop()
    const resultingArray = []
    for (let a = 0; a < middlePosition; a++) {
        resultingArray.push(sortedArr[a])
    }
    const reversedArray = sortedArr.reverse()
    resultingArray.push(middleNumber)
    for (let a = 0; a < middlePosition; a++) {
        resultingArray.push(reversedArray[a])
    }
    console.log(resultingArray.join(' '))
    return resultingArray.join(' ')
} 
`