#include <stdio.h>
int main(){
int yea,mon;
scanf("%d %d",&yea,&mon);
if(mon==2){
if(yea%4==0&&yea%100!=0||yea%400==0)
printf("29\n");
else printf("28\n");
}
else {
if(mon==1||mon==3||mon==5||mon==7||mon==8||mon==10||mon==12)
printf("31\n");
else printf("30\n");
}
}
int main(){
int yea,mon;
scanf("%d %d",&yea,&mon);
if(mon==2){
if(yea%4==0&&yea%100!=0||yea%400==0)
printf("29\n");
else printf("28\n");
}
else {
if(mon==1||mon==3||mon==5||mon==7||mon==8||mon==10||mon==12)
printf("31\n");
else printf("30\n");
}
}