# Analyze: 闰年 def is_leap(year): return (year % 4 == 0 and year % 100 != 0) or year % 400 == 0 def find_day(year, month, day): days = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31] result = 0 if is_leap(year): days[1] = 29 for i in range(month-...