def isLeapYear(year): return True if ((year % 400 == 0) or (year % 4 == 0 and year % 100 != 0)) else False md = [31,28,31,30,31,30,31,31,30,31,30,31] while True: try: y, m = map(int, input().split()) if isLeapYear(y) and m == 2: print(29) else: ...