# 判斷是否閏年
def isleap(year):
 return year % 4 == 0 and year % 100 != 0 or year % 400 == 0

# 判斷月的天數
def month_days(year,month):
 if month in [1,3,5,7,8,10,12]:
 return 31
 if month == 2:
 if isleap(year):
 return 29
 else:
 return 28
 return 30

# 1900年到輸入年份的總天數
def total_days(year):
 s = 0
 for i in range(1900,year):
 if isleap(i):
 s += 366
 else:
 s += 365
 return s

# 1月到輸入月份的天數
def days(year,month):
 s = 0
 for i in range(1,month):
 s += month_days(year,i)
 return s

# 獲取某年某月的日歷
def monthcalendar(year,month):
 total = total_days(year) + days(year, month)
 a = total % 7
 print('星期日'.center(8, ' '), end='')
 print('星期一'.center(8, ' '), end='')
 print('星期二'.center(8, ' '), end='')
 print('星期三'.center(8, ' '), end='')
 print('星期四'.center(8, ' '), end='')
 print('星期五'.center(8, ' '), end='')
 print('星期六'.center(8, ' '), end='')
 print()
 count = 0
 for i in range(0, month_days(year, month) + a + 1):
 if i = a:
 print(format(' ','10'), end='')
 count += 1
 else:
 print(format(str(i - a),'^10'), end='')
 count += 1
 if count == 7:
 count = 0
 print()
 print()

# 輸出某年一年的日歷
def yearcalendar(year):
 for i in range(1,13):
 print(f'{i}月：')
 monthcalendar(year,i)
 print()

# 開始函數
def start():
 while True:
 print('-------歡迎來到萬歷表查詢頁面-------')
 print('1.查詢某年的日歷\n2.查詢某年某月的日歷\n3.退出查詢')
 print('---------------------------------')
 n = int(input('請輸入你的操作：'))
 if n == 1:
 year = int(input('請輸入要查詢的年份:'))
 yearcalendar(year)
 elif n == 2:
 year = int(input('請輸入要查詢的年份:'))
 month = int(input('請輸入1-12：'))
 monthcalendar(year,month)
 elif n == 3:
 print('退出成功')
 break
 else:
 print('指令錯誤，請重新輸入！??！')
if __name__ == '__main__':
 start()