题目

public class Main {static int[] date = new int[] {0,31,28,31,30,31,30,31,31,30,31,30,31};public static boolean res(StringBuffer s) {String ss = s.toString();//yyrrfor(int i=0;i<2;i++) {int x = Integer.parseInt(s.charAt(i)+"");int y = Integer.parseInt(s.charAt(i+1)+"");int z = Integer.parseInt(s.charAt(i+2)+"");if((y-x == 1) && (z-y == 1)) {return true;}}return false;}public static void main(String[] args) {//2022xxyy//2022不是闰年StringBuffer s = new StringBuffer();int sum = 0;for(int i=1;i<=12;i++) {if(i<10) {s.append("0"+i);}else {s.append(i);}for(int j=1;j<=date[i];j++) {if(j<10) {s.append("0"+j);}else {s.append(j);}//组成四位yyrrif(res(s)) {sum++;}s.delete(2,s.length());}s.delete(0,s.length());}System.out.println(sum);}
}