y,m=map(int,input().split()) if m==1 or m==3 or m==5 or m==7 or m==8 or m==10 or m==12: print(31) elif m==4 or m==6 or m==9 or m==11: print(30) else: if y%4==0 and y%100!=0 or y%400==0: print(29) else: print(28)