a = [1, 4, 6, 9, 13, 16, 19, 28, 40, 100]
num = int(input("请输入要插入的数字："))
a.append(num)
a.sort()
print(a)

lst = [1, 9, 7, 4, 2, 6, 5, 8]
evens = [x for x in lst if x % 2 == 0]
odds = [x for x in lst if x % 2 != 0]
result = evens + odds
print(result)  # [4, 2, 6, 8, 1, 9, 7, 5]

list1 = ['aa', 'bb', 'cc']
list2 = []
while list1:
    cur = list1.pop()
    list2.append(cur.upper())
print(list2)  # ['CC', 'BB', 'AA']

fib = [0, 1]
for i in range(2, 10):
    fib.append(fib[i-1] + fib[i-2])
print(fib)  # [0, 1, 1, 2, 3, 5, 8, 13, 21, 34]

t = tuple([3, 6, 9, 0, 5, 8])
n = int(input("请输入数字 n："))
half = len(t) // 2
print(t[half:])  # (0, 5, 8)
if n not in t:
    t = t + (n,) * 3
print(len(t))

lst = [91, 30, 93, 98, 26, 20, 90]
n = len(lst)
for i in range(n - 1):
    min_idx = i
    for j in range(i + 1, n):
        if lst[j] < lst[min_idx]:
            min_idx = j
    lst[i], lst[min_idx] = lst[min_idx], lst[i]
print(lst)

s = input("请输入一个单词：")
count = {}
for ch in s:
    count[ch] = count.get(ch, 0) + 1
for ch in s:
    if ch in count:
        print(f"{ch} {count[ch]}")
        del count[ch]

s = input("请输入字符串：").lower()
d = {}
for ch in s:
    d[ch] = d.get(ch, 0) + 1
max_key = max(d, key=d.get)
print(max_key)
print(d[max_key])

n = int(input("单词个数："))
cnt = {}
for _ in range(n):
    word = input().lower()
    cnt[word] = cnt.get(word, 0) + 1
ans = max(cnt, key=cnt.get)
print("出现最多：", ans)

scores = input("请输入数学 语文 英语成绩（空格分隔）：").split()
d = {'数学': int(scores[0]), '语文': int(scores[1]), '英语': int(scores[2])}
d.update({'物理': 95, '生物': 88})
d['数学'] += 4
v = d.pop('生物')
print(f"生物成绩是{v}分，数学成绩是{d['数学']}分")

fruit = ['苹果','香蕉','草莓','橙子','芒果','葡萄','蓝莓']
number = [1, 3, 5, 6, 13, 21, 10]
inv = dict(zip(fruit, number))
query = input("请输入水果名称：").strip()
print(inv.get(query, 0))

emails = ["user1@example.com", "user2@sample.org",
           "admin@sample.org", "guest@example.com"]
domain = input("请输入域名：")
result = [e for e in emails if e.endswith(f"@{domain}")]
print(result)

emails = input("请输入邮件地址(逗号分隔)：").split(',')
usernames = {e.split('@')[0] for e in emails}
print(len(usernames))

students = [
    {"姓名": "张三", "语文": 88, "数学": 92, "英语": 85},
    {"姓名": "李四", "语文": 75, "数学": 68, "英语": 80},
    {"姓名": "王五", "语文": 95, "数学": 89, "英语": 93},
]
for s in students:
    total = s["语文"] + s["数学"] + s["英语"]
    print(f'{s["姓名"]} 总分：{total}')
top = max(students, key=lambda s: s["语文"]+s["数学"]+s["英语"])
print(f'最高分：{top["姓名"]}')
all_pass = [s for s in students
            if s["语文"]>=60 and s["数学"]>=60 and s["英语"]>=60]
print(f'三科都及格：{len(all_pass)}人')

ip = input("请输入IP地址：")
parts = ip.split('.')
if len(parts) == 4:
    valid = all(p.isdigit() and 0 <= int(p) <= 255 for p in parts)
    print("合法" if valid else "不合法")
else:
    print("不合法")

import keyword
s = input("请输入字符串：")
if not s or ' ' in s or keyword.iskeyword(s):
    print("非法")
elif not (s[0].isalpha() or s[0] == '_'):
    print("非法")
elif not all(c.isalnum() or c == '_' for c in s[1:]):
    print("非法")
else:
    print("合法")

def is_valid(pwd):
    if len(pwd) < 6 or len(pwd) > 12:
        return False
    allowed = set("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$")
    if not all(c in allowed for c in pwd):
        return False
    types = sum([any(c.isupper() for c in pwd),
                 any(c.islower() for c in pwd),
                 any(c.isdigit() for c in pwd)])
    if types < 2:
        return False
    if not any(c in "!@#$" for c in pwd):
        return False
    return True

pwd = input("请输入密码：")
print("合规" if is_valid(pwd) else "不合规")

phone = input("请输入11位手机号：")
masked = phone[:3] + "****" + phone[7:]
print(masked)

n = int(input("请输入 n："))
nums = list(map(int, input("请输入 n 个正整数：").split()))
cur, mx = 1, 1
for i in range(1, n):
    if nums[i] == nums[i-1] + 1:
        cur += 1
        mx = max(mx, cur)
    else:
        cur = 1
print(f"最长连号长度：{mx}")

strs = ["abca", "abc", "abca", "abc", "abcc"]
if not strs:
    print("")
else:
    prefix = strs[0]
    for s in strs[1:]:
        while not s.startswith(prefix):
            prefix = prefix[:-1]
    print(f'最长公共前缀："{prefix}"')

s = input("请输入字符串：")
print("全不同" if len(set(s)) == len(s) else "有重复")

s = input("请输入字符串：")
words = s.split()[::-1]
result = ' '.join(w.swapcase() for w in words)
print(result)

s = input("请输入字符串：")
result = ""
i = 0
while i < len(s):
    count = 1
    while i + 1 < len(s) and s[i] == s[i+1]:
        count += 1
        i += 1
    result += s[i]
    if count > 1:
        result += str(count)
    i += 1
print(result)

s = input("请输入字符串 str：")
sub = input("请输入要删除的字符 sub：")
result = ''.join(ch for ch in s if ch not in sub)
print(result)

nums = [1, 3, 2, 3, 4, 3, 5]
target = 3
matched = [x for x in nums if x == target]
others = [x for x in nums if x != target]
result = matched + others
print(result)  # [3, 3, 3, 1, 2, 4, 5]

data = [("Tom",19,80), ("John",20,90), ("Jony",17,91), ("Jony",17,93)]
result = sorted(data, key=lambda x: (x[0], x[1], x[2]))
for item in result:
    print(item)

for x in range(100, 334):
    y, z = 2 * x, 3 * x
    digits = str(x) + str(y) + str(z)
    if '0' not in digits and len(set(digits)) == 9:
        print(f"{x} : {y} : {z}")
# 192 : 384 : 576
# 219 : 438 : 657
# 273 : 546 : 819
# 327 : 654 : 981

for i in range(10, 30):
    i3, i4 = str(i ** 3), str(i ** 4)
    if len(i3) == 4 and len(i4) == 6:
        if len(set(i3 + i4)) == 10:
            print(f"年龄：{i}")  # 18

n = int(input("总人数："))
m = int(input("牛牛的位置："))
people = list(range(1, n + 1))
count = 0
index = 0
while people:
    index = (index + 2) % len(people)
    count += 1
    if people[index] == m:
        print(count)
        break
    people.pop(index)

n = int(input("总人数 n："))
k = int(input("淘汰数 k："))
r = int(input("剩余人数 r："))
people = list(range(1, n + 1))
index = 0
while len(people) > r:
    index = (index + k - 1) % len(people)
    print(f"淘汰：{people.pop(index)}")
print(f"幸存者：{people}")

cards = [0] * 13
pos = 0
for i in range(1, 14):  # i = 牌面数字
    count = 0
    while count < i:
        if cards[pos % 13] == 0:
            count += 1
            if count == i:
                cards[pos % 13] = i
        pos += 1
print(cards)

for i in range(95860, 100000):
    s = str(i)
    if s == s[::-1]:  # 回文判断
        speed = (i - 95859) / 2
        print(f"新对称数：{i}，车速：{speed:.2f}")
        break

m = int(input("分子："))
n = int(input("分母："))
remainder = {}  # 余数 -> 位置
result = "0."
pos = 0
while m != 0:
    if m in remainder:
        start = remainder[m]
        print(f"{result}（循环节从第{start+1}位开始）")
        break
    remainder[m] = pos
    m *= 10
    result += str(m // n)
    m %= n
    pos += 1
else:
    print(result)

num = input("请输入金额：")
int_part, dec_part = num.split('.') if '.' in num else (num, '00')
dec_part = dec_part.ljust(2, '0')[:2]
digits = '零壹贰叁肆伍陆柒捌玖'
units = ['', '拾', '佰', '仟', '万', '拾', '佰', '仟', '亿']

result = ''
for i, d in enumerate(int_part[::-1]):
    if d != '0':
        result = digits[int(d)] + units[i] + result
    elif not result.startswith('零'):
        result = '零' + result
result = result.rstrip('零') + '元'

if dec_part[0] != '0':
    result += digits[int(dec_part[0])] + '角'
if dec_part[1] != '0':
    result += digits[int(dec_part[1])] + '分'
print(result)

s = input("请输入一行字符：")
letters = sum(1 for c in s if c.isalpha())
spaces = sum(1 for c in s if c.isspace())
digits = sum(1 for c in s if c.isdigit())
others = len(s) - letters - spaces - digits
print(f"字母：{letters}，空格：{spaces}，数字：{digits}，其它：{others}")