문제 : 2007년 x월 y일이 무슨 요일인지 알아내보기
입력을 1 1 로 주면 MON 로 나오도록 만들어보기
사실 이렇게 길게 짜도 되는건지는 모르겠다.
어쨌든 스위치를 써서 정답이라는 결과를 받아냄!
답 :
import java.util.Scanner;
public class Main{
public static void main(String[] args) {
Scanner sc =new Scanner(System.in);
int mon = sc.nextInt();
int day = sc.nextInt();
switch(mon) {
case 1 :
switch(day%7) {
case 0 : System.out.println("SUN");break;
case 1 : System.out.println("MON");break;
case 2 : System.out.println("TUE");break;
case 3 : System.out.println("WED");break;
case 4 : System.out.println("THU");break;
case 5 : System.out.println("FRI");break;
case 6 : System.out.println("SAT");break;
}break;
case 2 :
switch((31+day)%7) {
case 0 : System.out.println("SUN");break;
case 1 : System.out.println("MON");break;
case 2 : System.out.println("TUE");break;
case 3 : System.out.println("WED");break;
case 4 : System.out.println("THU");break;
case 5 : System.out.println("FRI");break;
case 6 : System.out.println("SAT");break;
}break;
case 3 :
switch((31+28+day)%7) {
case 0 : System.out.println("SUN");break;
case 1 : System.out.println("MON");break;
case 2 : System.out.println("TUE");break;
case 3 : System.out.println("WED");break;
case 4 : System.out.println("THU");break;
case 5 : System.out.println("FRI");break;
case 6 : System.out.println("SAT");break;
}break;
case 4 :
switch((31*2+28+day)%7) {
case 0 : System.out.println("SUN");break;
case 1 : System.out.println("MON");break;
case 2 : System.out.println("TUE");break;
case 3 : System.out.println("WED");break;
case 4 : System.out.println("THU");break;
case 5 : System.out.println("FRI");break;
case 6 : System.out.println("SAT");break;
}break;
case 5 :
switch((31*2+28+30+day)%7) {
case 0 : System.out.println("SUN");break;
case 1 : System.out.println("MON");break;
case 2 : System.out.println("TUE");break;
case 3 : System.out.println("WED");break;
case 4 : System.out.println("THU");break;
case 5 : System.out.println("FRI");break;
case 6 : System.out.println("SAT");break;
}break;
case 6 :
switch((31*3+28+30+day)%7) {
case 0 : System.out.println("SUN");break;
case 1 : System.out.println("MON");break;
case 2 : System.out.println("TUE");break;
case 3 : System.out.println("WED");break;
case 4 : System.out.println("THU");break;
case 5 : System.out.println("FRI");break;
case 6 : System.out.println("SAT");break;
}break;
case 7 :
switch((31*3+28+30*2+day)%7) {
case 0 : System.out.println("SUN");break;
case 1 : System.out.println("MON");break;
case 2 : System.out.println("TUE");break;
case 3 : System.out.println("WED");break;
case 4 : System.out.println("THU");break;
case 5 : System.out.println("FRI");break;
case 6 : System.out.println("SAT");break;
}break;
case 8 :
switch((31*4+28+30*2+day)%7) {
case 0 : System.out.println("SUN");break;
case 1 : System.out.println("MON");break;
case 2 : System.out.println("TUE");break;
case 3 : System.out.println("WED");break;
case 4 : System.out.println("THU");break;
case 5 : System.out.println("FRI");break;
case 6 : System.out.println("SAT");break;
}break;
case 9 :
switch((31*5+28+30*2+day)%7) {
case 0 : System.out.println("SUN");break;
case 1 : System.out.println("MON");break;
case 2 : System.out.println("TUE");break;
case 3 : System.out.println("WED");break;
case 4 : System.out.println("THU");break;
case 5 : System.out.println("FRI");break;
case 6 : System.out.println("SAT");break;
}break;
case 10 :
switch((31*5+28+30*3+day)%7) {
case 0 : System.out.println("SUN");break;
case 1 : System.out.println("MON");break;
case 2 : System.out.println("TUE");break;
case 3 : System.out.println("WED");break;
case 4 : System.out.println("THU");break;
case 5 : System.out.println("FRI");break;
case 6 : System.out.println("SAT");break;
}break;
case 11 :
switch((31*6+28+30*3+day)%7) {
case 0 : System.out.println("SUN");break;
case 1 : System.out.println("MON");break;
case 2 : System.out.println("TUE");break;
case 3 : System.out.println("WED");break;
case 4 : System.out.println("THU");break;
case 5 : System.out.println("FRI");break;
case 6 : System.out.println("SAT");break;
}break;
case 12 :
switch((31*6+28+30*4+day)%7) {
case 0 : System.out.println("SUN");break;
case 1 : System.out.println("MON");break;
case 2 : System.out.println("TUE");break;
case 3 : System.out.println("WED");break;
case 4 : System.out.println("THU");break;
case 5 : System.out.println("FRI");break;
case 6 : System.out.println("SAT");break;
}break;
}
}
}
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