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中国矿业大学Python编程实践

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2025 CUMT 中国矿业大学 Python 编程实践 代码题解

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本博文提供的代码仅供参考学习，原题已遗失，先尝试后使用，不同年度课程题目可能略有差异

@[TOC]

Practice2

Practice2\1.py

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str = input()
len = len(str)
flag = True
for i in range(len//2):
    if str[i] != str[len-i-1]:
        flag = False
print(flag)

Practice2\10.py

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votes = [4, 7, 8, 1, 2, 2, 6, 2, 2, 1, 6, 8, 7, 4, 5, 5, 5, 8, 5, 5, 4, 2, 2, 6, 4]
candidate = int(input())
result = candidate in votes
print(result)

Practice2\11.py

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grades = {'J01':88,'J02':60,'J03':80,'J04':96,'J05':86,'J06':75,'J07':76,'J08':82}
print(grades['J06'])
print(grades.values())

Practice2\12.py

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month_days = {1:31, 2:28, 3:31, 4:30, 5:31, 6:30, 7:31, 8:31, 9:30, 10:31, 11:30, 12:31}
month = int(input())
print(month_days[month])

Practice2\2.py

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temp = float(input())
print("{:.2f}".format((temp-32)*5/9))

Practice2\3.py

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rate, base, year = input().split(',')
rate = float(rate)
base = int(base)
year = int(year)
per_month = rate*base/(1-1/(1+rate)**(year*12))
print("{:.2f}".format(per_month))
print("{:.2f}".format(per_month*year*12))

Practice2\4.py

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input = input()
len = len(input)
for i in range(len):
    print(input[len-i-1],end="")

Practice2\5.py

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input = input()
list = input.split(',')
num = 1
for i in input:
    if i==",":
        num+=1
print(f"{len(list)} {num}")

Practice2\6.py

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input = input()
num = 0
for i in input:
    if i == 'w' or i == 'W':
       num+=1
print(num)

Practice2\7.py

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input_str = list(input())
sorted_chars = sorted(input_str)
result = ' '.join(sorted_chars)
print(result)

Practice2\8.py

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# scores = []
# for i in range(10):
#     scores.append(float(input()))
scores = [8.5, 9, 9, 10, 7, 8, 8, 9, 8, 10]
scores.sort()
scores = scores[1:-1]
average = sum(scores) / len(scores)
print(f"{average:.2f}")

Practice2\9.py

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scores = eval(input())
fail_scores = [s for s in scores if s < 60]
excellent_scores = [s for s in scores if s >= 90]
fail_avg = sum(fail_scores) / len(fail_scores) if fail_scores else 0
excellent_avg = sum(excellent_scores) / len(excellent_scores) if excellent_scores else 0
print(f"{fail_avg:.1f}")
print(f"{excellent_avg:.1f}")

Practice3

Practice3\1.py

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x1, y1, x2, y2 = map(float, input().split(','))
distance = ((x2 - x1) ** 2 + (y2 - y1) ** 2) ** 0.5
print(f"{distance:.1f}")

Practice3\10.py

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m1 = int(input())
m2 = int(input())
m3 = int(input())

avg = (m1 + m2 + m3) / 3

if avg > 95 or ((m1 == 100 and m2 == 100 and m3 >= 80) or
                (m1 == 100 and m3 == 100 and m2 >= 80) or
                (m2 == 100 and m3 == 100 and m1 >= 80)):
    print("该同学获得一等奖学金。")
elif avg > 90 or ((m1 == 100 and m2 >= 75 and m3 >= 75) or
                 (m2 == 100 and m1 >= 75 and m3 >= 75) or
                 (m3 == 100 and m1 >= 75 and m2 >= 75)):
    print("该同学获得二等奖学金。")
elif m1 >= 70 and m2 >= 70 and m3 >= 70:
    print("该同学获得三等奖学金。")
else:
    print("该同学没有获得奖学金。")

Practice3\2.py

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pi = 3.14
r = float(input())
s = 4 * pi * r ** 2
v = 4 / 3 * pi * r ** 3
print(f"{s:.2f} {v:.2f}")

Practice3\3.py

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n = int(input())
y = n ** (1/3) if n % 2 else n ** 0.5
print(f"y的值为:{y}")

Practice3\4.py

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w = float(input())
y = w * 0.25 if w <= 50 else 50 * 0.25 + (w - 50) * 0.35
print(f"行李托运的运费是:{y}元")

Practice3\5.py

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salary = int(input())
if salary <= 400:
    f = salary * 0.005
elif salary <= 600:
    f = salary * 0.01
elif salary <= 800:
    f = salary * 0.015
elif salary <= 1500:
    f = salary * 0.02
else:
    f = salary * 0.03
print(f"工资{salary}，应缴党费{f:.2f}元")

Practice3\6.py

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a, b, c = map(float, input().split(','))
if a + b > c and a + c > b and b + c > a:
    if a == b == c:
        print("三角形是等边三角形")
    elif a == b or a == c or b == c:
        if abs(a**2 + b**2 - c**2) < 1e-6 or abs(a**2 + c**2 - b**2) < 1e-6 or abs(b**2 + c**2 - a**2) < 1e-6:
            print("三角形是等腰直角三角形")
        else:
            print("三角形是等腰非直角三角形")
    elif abs(a**2 + b**2 - c**2) < 1e-6 or abs(a**2 + c**2 - b**2) < 1e-6 or abs(b**2 + c**2 - a**2) < 1e-6:
        print("三角形是非等腰直角三角形")
    else:
        print("三角形是普通三角形")
else:
    print("输入的三个数，不能作为三角形的边组成三角形。")

Practice3\7.py

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M = int(input())
N = int(input())

if N % 2 != 0:
    print("输入的脚数为奇数，不合理！")
else:
    x = 2 * M - N // 2
    y = M - x

    if x < 0 or y < 0:
        print("求出的只数为负，输入的数据不合理！")
    else:
        print(f"鸡有{x}只，兔有{y}只")

Practice3\8.py

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year = int(input())
month = int(input())

if not (1000 <= year <= 2100 and 1 <= month <= 12):
    print("输入的年份或月份不合法！")
else:
    is_leap = (year % 4 == 0 and year % 100 != 0) or (year % 400 == 0)
    print(f"{year}年{'是闰年' if is_leap else '不是闰年'}")

    if month in [1, 2, 3]:
        quarter = "第一"
    elif month in [4, 5, 6]:
        quarter = "第二"
    elif month in [7, 8, 9]:
        quarter = "第三"
    else:
        quarter = "第四"
    print(f"{month}月是{quarter}季度")

    if month == 2:
        days = 29 if is_leap else 28
    elif month in [4, 6, 9, 11]:
        days = 30
    else:
        days = 31
    print(f"{month}月有{days}天")

Practice3\9.py

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a, b, c = map(float, input().split(','))

if a == 0 and b == 0:
    print("方程无意义")
elif a == 0:
    x = -c / b
    print(f"方程有一个根:{x:.2f}")
else:
    delta = b**2 - 4*a*c
    if delta > 0:
        x1 = (-b + delta**0.5) / (2*a)
        x2 = (-b - delta**0.5) / (2*a)
        print(f"方程有两个不等实根:x1={x1:.2f},x2={x2:.2f}")
    elif delta == 0:
        x = -b / (2*a)
        print(f"方程有两个相等实根:x1={x:.2f},x2={x:.2f}")
    else:
        real = -b / (2*a)
        imag = (-delta)**0.5 / (2*a)
        x1 = complex(real, imag)
        x2 = complex(real, -imag)
        print(f"方程有两个不等虚根:x1=({x1:.2f}),x2=({x2:.2f})")

Practice4

Practice4\1.py

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num = int(input())
original = num
reverse = 0

while num > 0:
    digit = num % 10
    reverse = reverse * 10 + digit
    num = num // 10

print(f"{original}的反序数是:{reverse}")

Practice4\10.py

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for A in range(1, 10):
    for B in range(0, 10):
        for C in range(1, 10):
            for D in range(0, 10):
                ABCD = A * 1000 + B * 100 + C * 10 + D
                CDC = C * 100 + D * 10 + C
                ABC = A * 100 + B * 10 + C
                if ABCD - CDC == ABC:
                    print(f"A={A} B={B} C={C} D={D}")

Practice4\11.py

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M = int(input())
N = int(input())

if N % 2 != 0:
    print("输入的脚数为奇数，不合理！")
else:
    found = False
    for chicken in range(M + 1):
        rabbit = M - chicken
        if 2 * chicken + 4 * rabbit == N:
            print(f"鸡有{chicken}只，兔有{rabbit}只")
            found = True
            break

    if not found:
        print("求出的只数为负，输入的数据不合理！")

Practice4\12.py

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M = int(input())
sequence = [1, 2, 3]
n = 3

while sequence[-1] <= M:
    next_value = sequence[-1] + sequence[-2] + sequence[-3]
    sequence.append(next_value)
    n += 1

print(f"数列从第{n}项开始，数值超过{M}。")
print(f"第{n}项的值为{sequence[-1]}。")

Practice4\13.py

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eps = float(input())
pi = 0
sign = 1
denominator = 1
term = 1

while abs(term) >= eps:
    pi += term
    sign *= -1
    denominator += 2
    term = sign / denominator

pi *= 4
print(f"近似值为:{pi}")

Practice4\14.py

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import math

x = eval(input())
sin_x = 0
n = 1
term = x

while abs(term) >= 1e-6:
    sin_x += term
    n += 1
    term = (-1)**(n+1) * x**(2*n - 1) / math.factorial(2*n - 1)

print(f"sin({x})的近似值为:{sin_x}")

Practice4\15.py

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a = float(input())
eps = 1e-6
x_prev = a
x_next = 0.5 * (x_prev + a / x_prev)

while abs(x_next - x_prev) >= eps:
    x_prev = x_next
    x_next = 0.5 * (x_prev + a / x_prev)

print(f"x的近似值为:{x_next:.6f}")

Practice4\2.py

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N = int(input())
K = 0
sum_squares = 0

while True:
    K += 1
    sum_squares += K * K
    if sum_squares >= N:
        K -= 1
        break

print(f"最大K值是{K}")

Practice4\3.py

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n = int(input())
for i in range(n + 1):
    spaces = ' ' * (n - i)
    numbers = str(i) * (2 * i + 1)
    print(spaces + numbers)

Practice4\4.py

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a, b, c = eval(input())

def gcd(x, y):
    while y:
        x, y = y, x % y
    return x

gcd_ab = gcd(a, b)
gcd_abc = gcd(gcd_ab, c)

lcm_ab = a * b // gcd_ab
lcm_abc = lcm_ab * c // gcd(lcm_ab, c)

print(f"最大公约数是{gcd_abc}，最小公倍数是{lcm_abc}。")

Practice4\5.py

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n = int(input())
result = []

for num in range(100, n + 1):
    a = num // 100
    b = (num // 10) % 10
    c = num % 10
    if num == a**3 + b**3 + c**3:
        result.append(str(num))

print(' '.join(result))

Practice4\6.py

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n = int(input())

for num in range(1, n + 1):
    sum_factors = 0
    for i in range(1, num):
        if num % i == 0:
            sum_factors += i
    if sum_factors == num:
        print(num)

Practice4\7.py

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n = int(input())

for num in range(1, n + 1):
    square = num * num
    if str(num) == str(square)[-len(str(num)):] or str(num) == str(square):
        print(num)

Practice4\8.py

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n = int(input())

def is_prime(num):
    if num < 2:
        return False
    for i in range(2, int(num**0.5) + 1):
        if num % i == 0:
            return False
    return True

sum_primes = sum(num for num in range(2, n) if is_prime(num))
print(sum_primes)

Practice4\9.py

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import math

n = int(input())
pairs = []

for a in range(1, n + 1):
    for b in range(a + 1, n + 1):
        sum_ab = a + b
        diff_ab = b - a
        if math.sqrt(sum_ab) == int(math.sqrt(sum_ab)) and math.sqrt(diff_ab) == int(math.sqrt(diff_ab)):
            pairs.append((a, b))

print(f"{n}以内的自然数对有：")
for pair in pairs:
    print(pair[0], pair[1])

print(f"自然数对共有{len(pairs)}对。")

Practice5

Practice5\1.py

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def is_odd(num):
    return num % 2 != 0

n = int(input())
print(f"{n}是{'奇数' if is_odd(n) else '偶数'}")

Practice5\10.py

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def isSymmetrical(lst):
    for i in range(4):
        for j in range(4):
            if lst[i][j] != lst[j][i]:
                return False
    return True


def matrix_sum(lst):
    total = 0
    for i in range(4):
        total += lst[i][i]
    return total


if __name__ == "__main__":
    matrix = []
    for _ in range(4):
        row = list(map(int, input().split(',')))
        matrix.append(row)

    if isSymmetrical(matrix):
        print("矩阵是对称矩阵")
    else:
        print("矩阵不是对称矩阵")

    print(f"矩阵对角线元素和是: {matrix_sum(matrix)}")

Practice5\11.py

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# 递推法
def iterative_f(n):
    total = 0.0
    for i in range(1, n+1):
        total += i / (2*i + 1)
    return total

# 递归法
def recursive_f(n):
    if n == 0:
        return 0.0
    return n / (2*n + 1) + recursive_f(n-1)

n = int(input())
print(f"递推法 f({n})= {iterative_f(n)}")
print(f"递归法 f({n})= {recursive_f(n)}")

Practice5\12.py

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def resolve(n,x):
    if n == 0:
        return 1
    if n == 1:
        return x
    return ((2 * n - 1) * x * resolve(n - 1, x) - (n - 1) * resolve(n - 2, x))/n
n = int(input())
x = float(input())
print(f"Legendre多项式的值： {resolve(n,x)}")

Practice5\2.py

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def passed(score):
    if score < 0 or score > 100:
        return "输入的成绩错误！"
    elif score >= 60:
        return "该同学成绩合格啦！"
    else:
        return "该同学成绩不合格，需继续努力！"

score = int(input())
print(passed(score))

Practice5\3.py

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def string_num(ch):
    letters = 0
    digits = 0
    spaces = 0
    others = 0
    for char in ch:
        if char.isalpha():
            letters += 1
        elif char.isdigit():
            digits += 1
        elif char.isspace():
            spaces += 1
        else:
            others += 1
    return letters, digits, spaces, others

ch = input()
letters, digits, spaces, others = string_num(ch)
print(f"统计结果：字母有{letters}个，数字有{digits}个，空格有{spaces}个，其他字符有{others}个。")

Practice5\4.py

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def coprime(a, b):
    while b:
        a, b = b, a % b
    return a == 1

a, b = map(int, input().split(','))
if coprime(a, b):
    print(f"{a}和{b}互质")
else:
    print(f"{a}和{b}不互质")

Practice5\5.py

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def fib(n):
    fib_list = []
    a, b = 1, 1
    for _ in range(n):
        fib_list.append(a)
        a, b = b, a + b
    return fib_list

n = int(input())
print(fib(n))

Practice5\6.py

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def FacSum(n):
    if n == 1:
        return 0
    sum_factors = 1
    for i in range(2, int(n**0.5) + 1):
        if n % i == 0:
            if i == n // i:
                sum_factors += i
            else:
                sum_factors += i + n // i
    return sum_factors

x = int(input())
pairs = set()

for a in range(2, x):
    b = FacSum(a)
    if b > a and FacSum(b) == a:
        pairs.add((a, b))

for pair in sorted(pairs):
    print(f"亲密数对: A={pair[0]:4}, B={pair[1]:4}")

Practice5\7.py

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def huiwen(num):
    return str(num) == str(num)[::-1]

M = int(input())
print(f"{M}{'是' if huiwen(M) else '不是'}回文数")

Practice5\8.py

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def prime(n):
    if n < 2:
        return False
    for i in range(2, int(n**0.5)+1):
        if n % i == 0:
            return False
    return True

a, b = map(int, input().split(','))
for num in range(a, b+1):
    if num % 2 == 0:
        for i in range(2, num//2 + 1):
            if prime(i) and prime(num - i):
                print(f"{num}={i}+{num-i}")
                break

Practice5\9.py

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def is_prime(n):
    if n < 2:
        return False
    for i in range(2, int(n**0.5)+1):
        if n % i == 0:
            return False
    return True

def is_palindrome(n):
    return str(n) == str(n)[::-1]

x = int(input())
count = 0
num = 2
result = []

while count < x:
    if is_prime(num) and is_palindrome(num):
        result.append(str(num))
        count += 1
    num += 1

for i in range(0, len(result), 10):
    print(','.join(result[i:i+10]) + ',')

Practice6

Practice6\1.py

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class BMI:
    def __init__(self, height, weight):
        self.bmi = weight / (height ** 2)
    def printBMI(self):
        print("您的BMI指数是：{:.1f}".format(self.bmi))

class ChinaBMI(BMI):
    def printBMI(self):
        bmi_level = ["偏瘦","正常","偏胖","肥胖","重度肥胖"]
        rate_level = ["低","平均水平","增加","中毒增加","严重增加"]
        level = 0
        if self.bmi < 18.5:
            level = 0
        elif self.bmi <= 23.9:
            level = 1
        elif self.bmi <= 26.9:
            level = 2
        elif self.bmi <= 29.9:
            level = 3
        else:
            level = 4
        print(f"您的BMI指数是：{self.bmi:.1f}\n"
              f"{bmi_level[level]}，相关疾病发病的危险性：{rate_level[level]}")
height = float(input())
weight = float(input())
person = ChinaBMI(height, weight)
person.printBMI()

Practice6\2.py

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class Vehicle:
    def __init__(self, speed, size, time, acceleration):
        print(f"初速度:{speed} 加速度:{acceleration} 体积:{size}")
        self.speed = speed
        self.size = size
        self.time = time
        self.acceleration = acceleration

    def move(self):
        print(f"移动了：{self.speed * self.time}")

    def setSpeed(self):
        print(f"设置的初速度为:{self.speed}")

    def speedUp(self):
        print(f"加速完后速度是:{self.speed + self.acceleration * self.time}")

    def speedDown(self):
        print(f"减速完后速度是:{max(0, self.speed - self.acceleration * self.time)}")


speed = int(input())
size = int(input())
time = int(input())
acceleration = int(input())
v = Vehicle(speed, size, time, acceleration)
v.setSpeed()
v.speedUp()
v.speedDown()

Practice6\3.py

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class Point:
    def __init__(self, x, y):
        self.x = x
        self.y = y
    def distance(self, other):
        return round(((self.x - other.x)**2 + (self.y - other.y)**2)**0.5, 2)

class Line:
    def __init__(self, p1, p2):
        dx = p1.x - p2.x
        dy = p1.y - p2.y
        self.k = None if dx == 0 else dy / dx
    def relationship(self, other):
        if self.k is None and other.k is None:
            return "平行"
        if self.k is None or other.k is None:
            return "相交"
        return "平行" if abs(self.k - other.k) < 1e-9 else "相交"

p = [Point(*map(float, input().split(','))) for _ in range(4)]
print(f"两点的欧式距离是{p[0].distance(p[1]):.2f}")
line1, line2 = Line(p[0], p[1]), Line(p[2], p[3])
print(line1.relationship(line2))

Practice7

Practice7\1.py

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s = input().strip()
c, f = 0, True
for i in s:
    if i == '(': c += 1
    elif i == ')':
        c -= 1
        if c < 0: f = False; break
print('配对成功' if f and c == 0 else '配对不成功')

Practice7\2.py

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n = int(input())
original = n
seen = set()
while n != 1 and n not in seen:
    seen.add(n)
    n = sum(int(d)**2 for d in str(n))
if n == 1:
    print("{}是快乐数字".format(original))
else:
    print("{}不是快乐数字".format(original))

Practice7\3.py

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m, n, k = int(input()), int(input()), int(input())
people = list(range(1, m + 1))
index = 0
for _ in range(n):
    index = (index + k - 1) % len(people)
    print(f"{people.pop(index)}号下船了")

Practice7\4.py

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nums = list(map(int, input().split(',')))
target = int(input())
found = False
for i in range(len(nums)):
    for j in range(i+1, len(nums)):
        if nums[i] + nums[j] == target:
            print(f"和为目标值的两个整数的下标是 ({i}, {j})")
            found = True
            break
    if found:
        break
if not found:
    print("和为目标值的两个整数的下标是 未找到")

Practice7\5.py

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# 1
n = int(input())
pri = 1
for i in range(0, n):
    pri += i
    num = pri
    print(num, end=" ")
    for j in range(i + 2, n + 1):
        num += j
        print(num, end=" ")
    print()
# 2
n = int(input())
matrix = [[0]*n for _ in range(n)]
num = 1
for d in range(n):
    i = d
    j = 0
    while i >= 0:
        matrix[i][j] = num
        num += 1
        i -= 1
        j += 1
for row in matrix:
    print(' '.join(map(str, filter(bool, row))),end=" \n")

Practice7\6.py

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n = int(input())
m = list(map(int, input().split()))
x = list(map(int, input().split()))
current = {0}
for i in range(n):
    mi = m[i]
    xi = x[i]
    current = {w + k * mi for w in current for k in range(xi + 1)}
print(len(current))

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