# 习题2.1
value = eval(input('请输入温度值(不带单位)：'))
unit = input('请输入单位：')
if unit in ['f', 'F']:
    c = (value - 32)/1.8
    print('转换后的温度是{}C'.format(int(c)))
elif unit in ['c', 'C']:
    f = 1.8*value + 32
    print('转换后的温度是{}F'.format(int(f)))
else:
    print('格式输入错误！')

# 习题3.2
power = 1.0
study = 'y'
unstudy = 'n'
temp = 0
state = 'y'
for i in range(0, 365):
    if state == study and (temp in [0,1,2]):
        power *= 1
        temp = (temp + 1)%7
    elif state == study and (temp in [3,4,5,6]):
        power *= 1.01
        temp = (temp + 1)%7
    elif state == unstudy:
        temp = 0
    else:
        pass
print("连续学习365天后能力值为{:.2f}".format(power))

# 习题3.4
a = input()
b = a[::-1]
if a == b:
    print("该数字是回文数！")
else:
    print("该数字不是回文数！")