#include<stdio.h>
	int main()
	{
    int y,m;
    scanf("%d %d",&y,&m);
    switch(m){
        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;
    }if(m=2){
        if(y%4==0&&y%100!=0||y%400==0)
        printf("29\n");
    }else printf("28\n");
}