function gradingStudents(grades: number[]): number[] {
    let results: number[] = [];
    
    for (let index = 0; index < grades.length; index++) {
        const grade: number = grades[index];
        
        if (grade < 38){
            results.push(grade);
            continue;
        }
        
        const nextMultiple: number = Math.ceil(grade / 5) * 5;
        const difference: number = Math.abs(nextMultiple - grade);
        
        if (difference < 3) results.push(nextMultiple);
        else results.push(grade);
    }
    
    return results;
}