GradingStudents.cs

// At HackerLand University, a passing grade is any grade 40 points or higher on a 100 point scale. Sam is a professor at the university and likes to round each student’s grade according to the following rules:

// If the difference between the grade and the next higher multiple of 5 is less than 3, round to the next higher multiple of 5
// If the grade is less than 38, don’t bother as it’s still a failing grade
// Automate the rounding process then round a list of grades and print the results.

// Input Format

// The first line contains a single integer denoting  (the number of students). 
// Each line  of the  subsequent lines contains a single integer, , denoting student 's grade.

// Constraints

// Output Format

// For each  of the  grades, print the rounded grade on a new line.

// Sample Input 0

// 4
// 73
// 67
// 38
// 33
// Sample Output 0

// 75
// 67
// 40
// 33
// Explanation 0

// The first grade,  is two below the next higher multiple of , so it rounds to . 
//  is  points less than the next higher multiple of  so it doesn’t round. 
// , like , rounds up to next higher multiple of , or  in this case. 
//  is less than , so it does not round.

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;

class Solution {

    /*
     * Complete the gradingStudents function below.
     */
    static int[] gradingStudents(int[] grades) {
        /*
         * Write your code here.
         */
        var results = new int[grades.Length];
        
        for (var i=0; i<grades.Length; i++) {
            if (grades[i] >= 38) {
                for (var j=0; j<5; j++) {
                    if ((grades[i] + j) % 5 == 0) {
                        var rounded = (grades[i] + j);
                        if (j >= 3) {
                            results[i] = grades[i];
                        } else {
                            results[i] = rounded;
                        }
                    }
                }
            } else {
                results[i] = grades[i];
            }
        }  
        
        return results;
    }

    static void Main(string[] args) {
        TextWriter tw = new StreamWriter(@System.Environment.GetEnvironmentVariable("OUTPUT_PATH"), true);

        int n = Convert.ToInt32(Console.ReadLine());

        int[] grades = new int [n];

        for (int gradesItr = 0; gradesItr < n; gradesItr++) {
            int gradesItem = Convert.ToInt32(Console.ReadLine());
            grades[gradesItr] = gradesItem;
        }

        int[] result = gradingStudents(grades);

        tw.WriteLine(string.Join("\n", result));

        tw.Flush();
        tw.Close();
    }
}