#include<stdio.h>
int main() {
int year, month, day;
while (scanf("%d %d", &year, &month) != EOF) {
switch (month) {
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:
printf("31\n");
break;
case 4:
case 6:
case 9:
case 11:
printf("30\n");
break;
case 2: { //2月平年28天,闰年29天
if (year % 400 == 0 || (year % 4 == 0 && year % 100 != 0))
printf("29\n");
else
printf("28\n");
}
}
}
return 0;
}
int main() {
int year, month, day;
while (scanf("%d %d", &year, &month) != EOF) {
switch (month) {
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:
printf("31\n");
break;
case 4:
case 6:
case 9:
case 11:
printf("30\n");
break;
case 2: { //2月平年28天,闰年29天
if (year % 400 == 0 || (year % 4 == 0 && year % 100 != 0))
printf("29\n");
else
printf("28\n");
}
}
}
return 0;
}