[알고리즘] 콜라츠 추측 Java

 

class Solution {
    public int solution(long num) {
        int answer = 0;
        
        while(num > 1) {
          num = num % 2 == 0 ? num / 2 : (num * 3) + 1;
          answer++;

          if(answer >= 500) {
            answer = -1;
            break;
          }
        }
        
        return answer;
    }
}