평균 구하기 public class Solution { public double solution(int[] arr) { int sum = 0; foreach (int num in arr) { sum += num; } double average = (double)sum / arr.Length; return average; } } 짝수와 홀수 public string solution(int num) { string answer = (num % 2 == 0 ? "Even" : "Odd" ); return answer; } 자릿수 더하기 public int solution(int n) { int answer = 0; while(n>0) { answer += n % 10; n /= 10; } return answ..