year,month=map(int,input().split(" ")) if 1583<=year<=2020 and 1<=month<=12: if month==1 or month==3 or month==5 or month==7 or month==8 or month==10 or month==12: print(31) elif month==2: if year%4==0: print(29) else: print(28) else: print(30)