[等級1]2016年(JAVA)

import java.util.*;

class Solution {
    public String solution(int a, int b) {
        Queue<String> q = new LinkedList<>();
        int[] howDay = new int[13];
        
        howDay[0] = 0; 
        howDay[1] = 31; howDay[2] = 29; howDay[3] = 31;
        howDay[4] = 30; howDay[5] = 31; howDay[6] = 30;
        howDay[7] = 31; howDay[8] = 31; howDay[9] = 30;
        howDay[10] = 31; howDay[11] = 30; howDay[12] = 31;
        
        q.offer("FRI"); q.offer("SAT"); q.offer("SUN"); 
        q.offer("MON"); q.offer("TUE"); q.offer("WED");
        q.offer("THU");
        
        int curDate = b;
        for(int i=0; i<a; ++i)
            curDate += howDay[i];
        
        for(int i=1; i<curDate; ++i)
            q.offer(q.poll());
        
        String answer = q.poll();
        return answer;
    }
}