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Python语言基础编程速通54题

使用OpenJudge上面的题集。
实用Python程序设计测验汇总(2022秋季)。

1 字符菱形

ch = input()
for i in range(1,6):
    if i <= 3:
        print(" "*(3-i)+ch*(2*i-1))
    else:
        print(" "*(i-3)+ch*(5-(i-3)*2))

2 字符三角形

# 2 字符三角形
ch = input()
print(" "*2+ch)
print(" "+ch*3)
print(ch*5)

3 输出第二个整数

# 3 输出第二个整数
ls = input().split()
print(ls[1])

4 求三个数的和

# 4 求三个数的和
text = input().split()
sum = 0
for i in text:
    sum += float(i)
print(sum)

5 判断子串

# 5 判断子串
son = input()
father = input()
if son in father:
    print("YES")
else:
    print("NO")

6 计算(a+b)*c的值

# 6 计算(a+b)*c的值
a,b,c=map(int,input().split())
sum=(a+b)*c
print(sum)

7 反向输出一个三位数

切片操作语法:

str[start:stop:step] # 其中依次表示为[开始索引:结束索引:步长]

其中是左闭右开区间,步长 step 可以为负数

# 7 反向输出一个三位数
a = input()
print(a[::-1])

8 字符串交换

切片。

# 8 字符串交换
str1 = input()
str2 = input()
s1 = str1[0:2] + str2[2:4]
s2 = str2[0:2] + str1[2:4]
print(s2+'\n'+s1)

9 字符串中的整数求和

# 9 字符串中的整数求和
a,b = map(str,input().split())
c = int(a[0:2])+int(b[0:2])
print(c)

10 计算2的幂

# 10 计算2的幂
mi = int(input())
mul = 1
for i in range(mi):
    mul *= 2
print(mul)

11 计算多项式的值

格式化字符串,也可以使用format。

# 11 计算多项式的值
x, a, b, c, d = map(float, input().split())
y = a*x**3 + b*x**2 + c*x + d
print("%.7f"%y)

12 奇偶性判断

# 12 奇偶数判断
n = int(input())
if n%2:
    print("odd")
else:
    print("even")

13 点和正方形的关系

判断条件。

# 13 点和正方形的关系
x, y = map(int, input().split())
if x <= 1 and x >= -1:
    if y <=1 and y >= -1:
        print("yes")
    else:
        print("no")
else:
    print("no")

14 三角形判断

# 14 三角形判断
a, b, c = map(int, input().split())
if a+b>c and b+c>a and a+c>b:
    print("yes")
else:
    print("no")

15 计算邮资

# 15 计算邮资
menu = input().split()
a = int(menu[0])
sum = 0
if a > 1000:
    b = int((a-1000)/500)
    if (a-1000)%500>0:
        sum = 8 + (b + 1) * 4
    else:
        sum = 8 + b * 4
else:
    sum += 8
if menu[1] == 'y':
    print(sum+5)
else:
    print(sum)

16 分段函数

# 16 分段函数
x = float(input())
y = 0
if x >= 0 and x < 5:
    y = -x + 2.5
elif x >= 5 and x < 10:
    y = 2 - 1.5*(x-3)*(x-3)
elif x >= 10 and x < 20:
    y = x / 2 - 1.5
print("%.3f"%y)

17 简单计算器

# 17 简单计算器
s = input().split()
str = s[0] + s[2] + s[1]
symbol = ['+', '-', '*', '/']
if s[2] in symbol:
    if s[2]=='/' and s[1] == '0':
        print("Divided by zero!")
    else:
        print(int(eval(str)))
else:
    print("Invalid operator!")

18 大象喝水

最初,是在lua语言中,math.ceil(x)返回大于等于参数x的最小整数,即对浮点数向上取整.

# 18 大象喝水
import math
h, r = map(int, input().split())
PI = 3.14159
v = h*PI*r*r
num = 20000/v
print(math.ceil(num))

19 苹果和虫子2

# 19 苹果和虫子2
import math
n, x, y = map(int, input().split())
res = n - math.ceil(y/x)
if res < 0:
    res = 0
print(res)

20 求整数的和与均值

# 20 求整数的和与均值
n = int(input())
sum = 0
for i in range(n):
    sum += int(input())
print("%d"%sum+" "+"%.5f"%(sum/n))

21 整数序列的元素最大跨度值

# 21 整数序列的元素最大跨度值
n = int(input())
array = input().split()
array = [int(i) for i in array]
print(max(array)-min(array))

22 奥运奖牌计数

# 22 奥运奖牌计数
n = int(input())
jin = 0
yin = 0
tong = 0
for i in range(n):
    array = input().split()
    array = [int(i) for i in array]
    jin += array[0]
    yin += array[1]
    tong += array[2]
print("%d"%jin+" "+"%d"%yin+" "+"%d"%tong+" "+"%d"%(jin+yin+tong))

23 鸡尾酒疗法

# 23 鸡尾酒疗法
n = int(input())
x0 = input().split()
baseline = float(x0[1])/float(x0[0])
for i in range(n-1):
    x1 = input().split()
    a = float(x1[1])/float(x1[0])
    sub = a -baseline
    if sub > 0.05:
        print("better")
    elif sub < -0.05:
        print("worse")
    else:
        print("same")

24 角谷猜想

# 24 角谷猜想
n = int(input())
while n!=1:
    if n % 2:
        print(str(n)+"*3+1="+str(n*3+1))
        n=n*3+1
    else:
        print(str(n)+"/2=%d"%(n/2))
        n//=2
print("End")

25 正常血压

# 25 正常血压
n = int(input())
total = 0
maxtotal = 0
for i in range(n):
    s = input().split()
    a, b = int(s[0]), int(s[1])
    if 90<=a<=140 and 60<=b<=90:
        total+=1
        if maxtotal<total:
            maxtotal = total
    else:
        total = 0
print(maxtotal)

26 数字反转

# 26 数字反转
n = int(input())
while n%10 == 0:
    n = int(n/10)
n = str(n)
if n[0] == '-':
    print("-"+n[:0:-1])
else:
    print(n[::-1])

27 求特殊自然数

# 27 求特殊自然数
def stoi(n, i):
    if i < 2 or i > 10:
        return -1
    ys = ""
    while n >= i:
        ys = str(n%i) + ys
        n //= i
    ys = str(n) + ys
    return ys
for i in range(1,999):
    if len(stoi(i, 7)) == 3 and len(stoi(i, 9)) == 3:
        if str(stoi(i, 7)) == str(stoi(i, 9))[::-1]:
            print(i)
            print(stoi(i, 7))
            print(stoi(i, 9))

28 数字统计

# 28 数字统计
l, r = map(int, input().split())
c = ""
for i in range(l, r + 1):
    c += str(i)
sum = 0
for j in c:
    if j == '2':
        sum += 1
print(sum)

29 求最大公约数问题

# 29 求最大公约数问题
a, b = map(int, input().split())
if a < b:
    a, b = b, a
while a % b:
    a, b = b, a%b
print(b)

30 多少种取法

# 30 多少种取法
def ways(m, n, s):
    if m > s:
        return ways(s, n, s)
    elif n == 0 and s == 0:
        return 1
    elif m == 0 or s == 0:
        return 0
    else:
        return ways(m-1,n-1,s-m)+ways(m-1,n,s)
n = int(input())
for i in range(n):
    m, n, s = map(int, input().split())
    print(ways(m, n, s))

31 石头剪刀布

# 31 石头剪刀布
n, a, b = map(int, input().split())
aScore, bScore = 0, 0
na = [int(i) for i in input().split()]
nb = [int(i) for i in input().split()]
for k in range(n):
    if (na[k%a]==2 and nb[k%b]==5) or (na[k%a]==5 and nb[k%b]==0) or (na[k%a]==0 and nb[k%b]==2):
        aScore += 1
    elif na[k%a] == nb[k%b]:
        pass
    elif (na[k%a]==5 and nb[k%b]==2) or (na[k%a]==0 and nb[k%b]==5) or (na[k%a]==2 and nb[k%b]==0):
        bScore += 1
if aScore > bScore:
    print('A')
elif aScore == bScore:
    print('draw')
elif aScore < bScore:
    print('B')

32 统计数字字符个数

# 32 统计数字字符个数
s = input()
ret = 0
for i in range(len(s)):
    if s[i].isdigit():
        ret += 1
print(ret)

33 大小写字母互换

# 33 大小写字母互换
s = input()
for c in s:
    if 'a' <= c <= 'z':
        print(chr(ord(c) - 32 ),end="")
    elif 'A' <= c <= 'Z':
        print(chr(ord(c) + 32),end="")
    else:
        print(c,end="")

34 过滤多余的空格

# 34 过滤多余的空格
s = input()
for i in range(len(s)):
    if s[i] == ' ' and s[i-1] == ' ':
        print('', end='')
    else:
        print(s[i], end='')

35 找第一个只出现一次的字符

# 35 找第一个只出现一次的字符
s = input()
flag = 1
for i in range(len(s)):
    if s.count(s[i]) == 1:
        print(s[i])
        flag = 0
        break
if flag:
    print('no')

36 判断字符串是否为回文

# 36 判断字符串是否为回文
s = input()
flag = 1
length = int(len(s)/2)
for i in range(length):
    if s[i] != s[len(s)-1-i]:
        print("no")
        flag = 0
        break
if flag:
    print("yes")

37 字符串最大跨距

# 37 字符串最大跨距
SS = input().split(",")
s,s1,s2 = SS[0],SS[1],SS[2]
a = s.find(s1)
b = s.rfind(s2)
c = len(s1)
if b-a-c >= 0: 
    print(b-a-c) 
else: 
    print("-1")

38 找出全部子串位置

# 38 找出全部子串位置
n = int(input())
for i in range(n):
    s = input().split()
    m = 0
    if s[1] not in s[0]:
        print('no',end='')
    for j in s[0]:
        a = s[0].find(s[1], m)
        if a == -1:
            continue
        else:
            m = a + len(s[1])
            print(a, end=' ')
    print("")

39 万年历

# 39 万年历
n = int(input())

def days_of_week(year, mon, day):
    list1 = [31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]  #闰年2月份为29天
    list2 = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]  #平年2月份为28天
    date = 0
    years = 0

    lst_days = [
        "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday",
        "Saturday"
    ]

    if (year % 4 == 0) & (year % 100 != 0) or year % 400 == 0:
        if mon in [1, 3, 5, 7, 8, 10, 12]:
            if day < 1 or day > 31:
                print('Illegal')
                return
        elif mon == 2:
            if day < 1 or day > 29:
                print('Illegal')
                return
        elif mon in [4, 6, 9, 11]:
            if day < 1 or day > 30:
                print('Illegal')
                return
        else:
            print('Illegal')
            return
    else:
        if mon in [1, 3, 5, 7, 8, 10, 12]:
            if day < 1 or day > 31:
                print('Illegal')
                return
        elif mon == 2:
            if day < 1 or day > 28:
                print('Illegal')
                return
        elif mon in [4, 6, 9, 11]:
            if day < 1 or day > 30:
                print('Illegal')
                return
        else:
            print('Illegal')
            return

    #输入的年份大于等于2018年的判断过程如下:
    if year >= 2018:
        for j in range(2018, year):
            if (j % 4 == 0) & (j % 100 != 0) or j % 400 == 0:  #闰年
                years += 366
            else:  #平年
                years += 365  #闰年天数加366天,平年加365天

        if ((year % 4) == 0) & ((year % 100) != 0) or ((year % 400) == 0):
            for i in range(mon - 1):
                date += list1[i]  #闰年月份按list1相加
            days = date + day
        else:
            for i in range(mon - 1):
                date += list2[i]  #平年月份按list2相加
            days = date + day

        total = days + years
        ji = total % 7  #参考日期是2018年1月1号是星期一

        #由于"ji=0"时,输出的结果是"星期0",因此对"ji"进行了判断,使"ji=0"时输出的结果为"星期7"
        print(lst_days[ji])

    #输入的年份小于2018年的判断过程如下:
    else:
        for j in range(year + 1, 2018):
            if (j % 4 == 0) & (j % 100 != 0) or j % 400 == 0:
                years += 366
            else:
                years += 365

        if ((year % 4) == 0) & ((year % 100) != 0) or ((year % 400) == 0):
            for i in range(mon - 1, 12):
                date += list1[i]
            days = date - day + 1
        else:
            for i in range(mon - 1, 12):
                date += list2[i]
            days = date - day + 1

        total = days + years
        ji = total % 7
        print(lst_days[(8 - ji)%7])


for i in range(n):
    year, mon, day = map(int, input().split())
    days_of_week(year, mon, day)

40 成绩排序

# 40 成绩排序
a = []
swp = {}
num = int(input())
for i in range(num):
    b = input().split()
    b[1] = int(b[1])
    a.append({"name":b[0], 'score':b[1]})
for i in range(num):
    for j in range(i+1, num):
        if a[i]["score"] < a[j]["score"] or (a[i]["score"] == a[j]["score"] and a[i]["name"] > a[j]["name"]):
            swp = a[i]
            a[i] = a[j]
            a[j] = swp   #冒泡排序
for i in range(num):
    print("%s %d"%(a[i]["name"],a[i]["score"]))

41 图像模糊处理

# 41 图像模糊处理
import copy
n,m = map(int,input().split())
a = []

for i in range(n):
    lst = list(map(int,input().split()))
    a.append(lst)
    
b = copy.deepcopy(a) # b = a[:] 是浅拷贝,不行

for i in range(1,n-1):
    for j in range(1,m-1):
        b[i][j] = round((a[i][j] + a[i-1][j] + a[i+1][j] + a[i][j-1] + a[i][j+1])/5)

for i in range(0,n):
    for j in range(0,m):
        print(b[i][j],end = " ")
    print("")

42 向量点积计算

# 42 向量点积计算
n = int(input())
a = [int(i) for i in input().split()]
b = [int(i) for i in input().split()]
vetSum = 0
for i in range(n):
    vetSum += a[i]*b[i]
print(vetSum)

43 病人排队

# 43 病人排队
n = int(input())
a = []
for i in range(n):
    s = input().split()
    lst = [str(s[0]),int(s[1])]   #添加上登记顺序
    a.append(lst)
def KEY(x):
    if x[1]>=60:
        return-x[1]  #年龄从大到小
    else:
        return 0
a.sort(key=KEY)  #key为自定义比较函数,按函数f的方式比较
for i in range(n):
    print(a[i][0])

44 矩阵乘法

# 44 矩阵乘法
m, n, k = map(int, input().split())
A = []
B = []
for i in range(m):
    A.append(list(map(int, input().split())))
for i in range(n):
    B.append(list(map(int, input().split())))

C = [[0 for i in range(k)] for i in range(m)]

for i in range(m):
    for j in range(k):
        for q in range(n):
            C[i][j] += A[i][q] * B[q][j]
        print(C[i][j], end=' ')
    print("")

45 回文子串

# 45 回文子串
s = input()
n = len(s)
res = []
for i in range(0, n-1):
    for j in range(i+1, n):
        if s[i: j+1] == s[j:i:-1] + s[i]:
            tmpList = [j-i+1, i, s[i:j+1]]
            res.append(tmpList)
res.sort()
for i in range(len(res)):
    print(res[i][2])

46 校园食宿预订系统

# 46 校园食宿预订系统
n, m = map(int,input().split())
t={}
for i in range(m):
    s = input().split()
    name, price, num =s[0], int(s[1]), int(s[2])
    t[name]=[price,num]
total = 0
for i in range(n):
    names = input().split()
    for name in names:
        if t[name][1]>0:
            total += t[name][0]
            t[name][1] -= 1
print(total)

47 找出所有整数

# 47 找出所有整数
import re
m = '[0-9]+'
while True:
    try:
        s = input()
        lst = re.findall(m,s)
        for x in lst:
            print(x)
    except:
        break

48 找出所有整数和小数

# 48 找出所有整数和小数
import re
m='[0-9]+\.[0-9]+|[0-9]+'
while True:
    try:
        s = input()
        lst = re.findall(m,s)
        for x in lst:
            print(x)
    except:
        break

49 找出小于100的整数

# 49 找出小于100的整数
import re
m = r"(^|[^0-9-])(\d{1,2})([^0-9]|$)"
for i in range(2):
        s = input()
        lst = re.findall(m,s)
        for x in lst:
            # // 在此处补充你的代码
            print(x[1])

50 密码判断

# 50 密码判断
import re

m='[A-Za-z][-A-Za-z0-9_]{7,}\Z'

while True:
    try:
        s = input()
        if re.match(m,s) != None:
            print("yes")
        else:
            print("no")
    except:
        break

51 寻找h3

# 51 寻找h3
import re
m = \
'<h3>(.*?)</h3>'
for x in  re.findall(m,"cdef<h3>abd</h3><h3>bcK</h3><h3>123</h3>KJM"):
    print(x)

52 找<>中的数

# 52 找<>中的数
n=int(input())
import re
for i in range(n):
    s=input()
    m='<(0|[1-9][0-9]{0,2})>'
    result=re.findall(m,s)
    if result==None:
        print("NONE")
    elif len(result)==0:
        print("NONE")
    else:
        for x in result:
            print(x,end=" ")
        print("")

53 手机号码

# 53 手机号码
import re
n=int(input())
isfirstprint=True
for j in range(n):
    s = input()
    m = '<(.+?)>(.*?)</\\1>'
    result = re.findall(m, s)
    if len(result) == 0:
        if not isfirstprint:
            print("\n",end="")
        print("NONE",end="")
        isfirstprint=False
    else:
        isNone = True
        for x in result:
            # 查找电话号码
            m = '\([0-9]{1,2}\)-[0-9]{3,}'
            phone_maybe = re.findall(m, x[1])
            if len(phone_maybe) == 0:
                continue
            else:
                phone = []
                for tmp in phone_maybe:
                    if len(re.findall('-[0-9]+', tmp)[0]) < 5:
                        phone += re.findall('\(([0-9]{1,2})\)-[0-9]{3,}', tmp)
                if len(phone) > 0:
                    isNone=False
                    if not isfirstprint:
                        print("")
                    isfirstprint=False
                    print("<" + x[0] + ">", end="")
                    isFirstPrinthere=True
                    for tt in phone:
                        if not isFirstPrinthere:
                            print(",", end="")
                        print(tt, end="")
                        isFirstPrinthere=False
                    print("</" + x[0] + ">",end="")
        if isNone==True:
            if not isfirstprint:
                print("")
            print("NONE",end="")
            isfirstprint=False

54 时间处理

# 54 时间处理
import datetime
s=[]
t=[]
while True:
    try:
        s.append(input())
    except:
        break
for i in range(len(s)):
    if i%2==0:
        if len(s[i].split())==5:
            a=datetime.datetime.strptime(s[i],'%Y %m %d %H %M')
        else:
            a = datetime.datetime.strptime(s[i], '%m-%d-%Y %H:%M %p')
    else:
        ss=s[i].split()
        if len(ss)==1:
            a+=datetime.timedelta(seconds=int(ss[0]))
        else:
            a+=datetime.timedelta(days=int(ss[0]),hours=int(ss[1]),minutes=int(ss[2]))
        t.append(a)
for i in t:
    print(i)

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