#include<stdio.h>

int main() { int year,month,yet; while(scanf("%d %d",&year,&month)!=EOF) { int Leap_year(int); yet=Leap_year(year); if(month==1||month==3||month==5||month==7||month==8||month==10||month==12) printf("31\n"); else if(month==4||month==6||month==9||month==11) printf("30\n"); else { if(yet==0) printf("28\n"); else printf("29\n"); } } return 0; } int Leap_year(int x) { if(x%4!=0) return 0; else { if((x%100==0)&&(x%400!=0)) { return 0; } else return 1; }

}