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