I tested my solution in VSCode and results are correct, but i cannot submit as I get message the results are wrong. Could you check please?

function gradingStudents( grades ) {

const rounded = []; const gradesOnly = [...grades]; gradesOnly.shift(); for( let grade of gradesOnly ) if( grade < 38 || grade % 5 === 0 ) rounded.push(grade); else if( Math.floor(grade / 5) * 5 + 5 - grade < 3) rounded.push(Math.floor(grade / 5) * 5 + 5); else rounded.push(grade); return rounded;
}

I confess that, at first, I tried to round the value directly, but then I remembered that Math.ceil only works for floats, so:

Divide the number by the multiple (5):

value / 5 = X

Since we're rounding up, we'll round it to the next whole number, which is Y.

Now, multiply Y by multiple (5) to find the nearest multiple of 5 that's greater than the "value"

function gradingStudents(grades: number[]): number[] {
	const response = grades.reduce((acc, value, index) => {
		const next = Math.ceil(value / 5) * 5;
		const factor = Math.abs(next - value);
		acc[index] = value;
		if (factor < 3 && value >= 38) {
			acc[index] = next;
		}
		return acc;
	}, [] as number[]);
	return response;
}

This is my solution, how are things?

vector gradingStudents(vector grades) { for(int i = 0; i < grades.size(); i++){

if(grades[i] > 37){
  if((grades[i]+1)%5 == 0)
    grades[i] += 1;
  else if((grades[i]+2)%5 == 0)
    grades[i] += 2;    
}

} return grades; }

There is an issue with the question. It assumes the input to have the first element as the number of students (not a grade). However, my code only worked when considering the first element (grades[0] in python)..

Code

def complement(x, m): return (m - (x % m)) % m

def gradingStudents(grades): result = [] # Create a new list instead of modifying grades

for grade in grades:
    if grade < 38 or grade % 5 < 3:
        result.append(grade)  # No rounding needed
    else:
        result.append(grade + complement(grade, 5))  #  Round up properly    
return result  #  Return a new list

Here is my solution in python:

Write your code here

grade_1=[]
for i in grades:
    if i>=38:
        if (math.ceil(i/5)*5)-i < 3:
            grade_1.append(((math.ceil(i/5)*5)))
        else:
            grade_1.append(i)
    else:
        grade_1.append(i)
return grade_1