Python-100道练习题答案

题目链接：http://www.runoob.com/python/python-100-examples.html

 

#5.
# def find_max():
#     a=int(input("输入:"))
#     b = int(input("输入:"))
#     c = int(input("输入:"))
#     list_=[a,b,c]
#     print(list_)
#     list_.sort()
# find_max()
#6.
# def f(a):
#     if a==1 or a==2:
#         flag=-1
#         return 1
#     else:
#         return f(a-2)+f(a-1)
# print(f(12))
# for i in range(1,13):
#     print(f(i))
#7
# a=[1,2,3,5,4,3,32,2]
# b=a[:]
# print(b)
#8
# for i in range(1,10):
#     for j in range(1,i+1):
#         print("%d * %d = %d "%(i,j,j*i),end="")
#     print()
#9
# import time
# time.sleep(1)
# print("s")
#10
# import time
# print(time.strftime("%Y-%m-%d %H:%M:%S",time.localtime(time.time())))
# time.sleep(1)
# print(time.strftime("%Y-%m-%d %H:%M:%S",time.localtime(time.time())))
#11
# def f(a):
#     if a==1 or a==2:
#         return 1
#     else:
#         return f(a-1)+f(a-2)
# print(f(11))
#12
# import math
# def sushu():
#     a=[x for x in range(100,201)]
#     for i in a:
#         flag = 1
#         b=int(math.sqrt(i // 2 + 1))+1
#         for j in range(2,b):
#             if i%j==0:
#                 flag=-1
#                 break
#         if flag==1:
#             print(i)
# sushu()
#13
# def f():
#     for i in range(100,1000):
#         b=i//100
#         s=i//10%10
#         g=i%10
#         if b**3+s**3+g**3==i:
#             print(i)
# f()
#14
# import math
# def f(a):
#     print("{}=".format(a),end="")
#     c=[]
#     i=2
#     while i <=a:
#         if a%i==0:
#             c.append(i)
#             a=a/i
#             print("{}*".format(i),end="")
#             i=2
#         else:
#             i+=1
# f(100)
#15
# def f():
#     a=float(input("输入成绩:"))
#     if 90<=a<=100:
#         print("成绩是:A")
#     elif 70<=a<90:
#         print("成绩是:B")
#     else:
#         print("成绩是:C")
# f()
#16
# import time
# a=time.strftime("%Y-%m-%d %H:%M:%S",time.localtime(time.time()))
# print(a)
#17
# def f():
#     space=0
#     digit=0
#     alpha=0
#     other=0
#     a=input("输入任意内容")
#     a=list(a)
#     for i in a:
#         if i.isspace():
#             space+=1
#         elif i.isalpha():
#             alpha+=1
#         elif i.isdigit():
#             digit+=1
#         else:
#             other+=1
#     print("字母是%d个,数字是%d个,空格是%d个,其他是%d个"%(alpha,digit,space,other))
# f()
#18
# def f(a,num):
#     sum_a_num=0
#     if num==0:
#         print("0")
#     else:
#         for i in range(num):
#             for j in range(-1,i):
#                 print(a,end="")
#             print()
#     print(sum_a_num)
# f(2,5)
# def f(a,num):
#     c=[]
#     t=0
#     if num==0:
#         print("0")
#     else:
#         for i in range(num):
#             t=t+a
#             a=a*10
#             print(t)
#             c.append(t)
#     print(sum(c))
# f(2,5)
#19
# def f():
#     for i in range(2,1001):
#         c = []
#         for j in range(1,i//2+1):
#             if i%j==0:
#                 c.append(j)
#         if sum(c)==i:
#             for k in c:
#                 print(k,end=",")
#             print()
#             print(i)
# f()
#20
# def high(n):
#     h=100
#     n_high=100/(2**(n))
#     print(n_high)
# high(10)
#21
# num=1
# for i in range(1,10):
#     num=2*(num+1)
# print(num)
#22
# def f():
#     jia="abc"
#     yi="xyz"
#     for i in jia:
#         for j in yi:
#             if (i=="a" and  j=="x")  or (i=="c" and  j=="x" )or (i=="c" and  j=="z" ):
#                 print(i,j)
# f()
# #23
# for i in range(1,4):
#     for j in range(1,4-i):
#         print(" ",end="")
#     for k in range(1,2*i+1-1):
#         print("*",end="")
#     print()
# for i in range(1,3):
#     for j in range(1,i+1):
#         print(" ",end="")
#     for k in range(1,2*(3-i)+1-1):
#         print("*",end="")
#     print()
#24
# def f():
#     i=2
#     j=1
#     a=0
#     for x in range(10):
#         a = i / j
#         b=j
#         j = i
#         i = i + b
#         # a+=a
#         print(a)
# f()
#25
# def f():
#     sum_=0
#     for i in range(1,21):
#         s=1
#         for j in range(1,i+1):
#             s=s*j
#         sum_+=s
#     print(sum_)
# f()
#26
# def f(n):
#     if n==1:
#         return 1
#     else:
#         return n*f(n-1)
# print(f(5))
#27
# def f(a,b):
#     if b>=1:
#         print(a[b-1],end="")
#         return f(a,b-1)
#     else:
#         exit()
# str_=input("字符串:")
# len_str=len(str_)
# f(str_,len_str)
#28
# def f(n):
#     if n==1:
#         return 10
#     else:
#         return 2+f(n-1)
# print(f(5))
#29
# def f():
#     a=int(input("输入数字"))
#     b=str(a)
#     len_a=len(b)
#     print("长度是:",len_a)
#     for i in range(len_a):
#         print(b[len_a-i-1],end="")
# f()
#30
# def f():
#     a=input("输入:")
#     len_a=len(a)
#     len_a2=len(a)//2
#     for i in range(len_a2):
#         flag = 1
#         if a[len_a-i-1]!=a[i]:
#             print("不是回文")
#             flag=-1
#             break
#     if flag==1:
#         print("回文")
# f()
#31
# def f():
#     a=input("输入:")
#     if a[0].lower()=="w":
#         print("星期三")
#     elif a[0].lower()=="m":
#         print("星期一")
#     elif a[0].lower()=="f":
#         print("星期五")
#     elif a[0].lower()=="t":
#         if a[1].lower()=="h":
#             print("星期四")
#         else:
#             print("星期二")
#     elif a[0].lower()=="s":
#         if a[1].lower()=="a":
#             print("星期六")
#         else:
#             print("星期日")
# f()
#32
# def f():
#     a=input("输入:")
#     a=list(a)
#     lena=len(a)
#     len_a=len(a)-1
#     for i in range(lena):
#         print(a[len_a-i],end="")
# f()
#33
# a=[1,2,3]
# print("_".join(str(x) for x in a))
#34
# def func1():
#     print("这是函数1")
# def func2():
#     func1()
#     print("这是函数2")
# func2()
#35
#36
# import math
# def f():
#     a=[i for i in range(1,101)]
#     print(a)
#     for k in range(4,101):
#         b=int(math.sqrt(k))+1
#         print(b)
#         for j in range(2,b):
#             if k%j==0:
#                 a.remove(k)
#                 break
#     print(a)
# f()
#37
# def f():
#     a=list(input("输入数字:"))
#     print(a)
#     len_a=len(a)
#     for i in range(len_a):
#         for j in range(i+1,len_a):
#             if a[i]<=a[j]:
#                 k=a[i]
#                 a[i]=a[j]
#                 a[j]=k
#     print(" ".join(a))
# f()
#38
# a=[]
# for i in range(0,4):
#     b=[]
#     for j in range(1,5):
#         b.append(i+j)
#     a.append(b)
# print(a)
# len_a=len(a)
# len_a_=len(a[0])
# sum_=0
# for i in range(len_a):
#     for j in range(len_a_):
#         if i==j:
#             sum_+=a[i][j]
# print(sum_)
#39
# def f():
#     a=list(input("输入:"))
#     len_a=len(a)
#     for i in range(len_a):
#         for j in range(i+1,len_a):
#             if a[i]<=a[j]:
#                 k=a[i]
#                 a[i]=a[j]
#                 a[j]=k
#     print(a)
#     print(" ".join(a))
#     b=input("输入一个数:")
#     for i in range(len_a):
#         if int(b)>=int(a[i]):
#             a.insert(i,b)
#             break
#     print(" ".join(a))
# f()
#40
# def f():
#     a=tuple(input("输入:"))
#     len_a=len(a)
#     for i in range(len_a):
#         print(a[len_a-1-i],end="")
# f()
#41
# def f():
#     var=0
#     print("var是:",var)
#     var+=1
# for i in range(3):
#     f()
# class A():
#     var=0
#     def f(self):
#         self.var+=1
#         print("var是:",self.var)
# a=A()
# for i in range(3):
#     a.f()
#42
# num=2
# def f():
#     num=1
#     print("局域:",num)
#     num+=1
# for i in range(3):
#     f()
#     num+=1
#     print("全局",num)
#43
# class A():
#     var=1
#     def f(self):
#         self.var+=1
#         print("属性是:",self.var)
# a=A()
# var1=9
# for i in range(3):
#     var1 += 1
#     print("变量是:",var1)
#     a.f()
#44
# x = [[12,7,3],
#     [4 ,5,6],
#     [7 ,8,9]]
#
# y= [[5,8,1],
#     [6,7,3],
#     [4,5,9]]
# c=[]
# for i in range(3):
#     b=[]
#     for j in range(3):
#         b.append(x[i][j]+y[i][j])
#     c.append(b)
# print(c)
#45
# a=[i for i in range(1,101)]
# print(sum(a))
# def f(n):
#     print((n*(n+1)/2))
# f(100)
#46
# while True:
#     a=int(input("输入某数:"))
#     if a**2<=50:
#         break
#     else:
#         print("和:",a**2)
#47
# def f():
#     a=input("一:")
#     b=input("二:")
#     c=a
#     a=b
#     b=c
#     print("一:",a)
#     print("二:",b)
# f()
#48
# def f():
#     a=int(input("一:"))
#     b=int(input("二:"))
#     if a==b:
#         print("%d=%d"%(a,b))
#     elif a>b:
#         print("%d>%d"%(a,b))
#     else:
#         print("%d<%d"%(a,b))
# f()
#49
# a=[lambda:[x for x in range(10)]]
# b=[x for x in range(10)]
# list2=[1,4,6,-3,-9,-2]
# print(sorted(c,key=lambda x:abs(x)))
# print(list(map(lambda x:x+1,c)))
# print(list(filter(lambda x: x%2==0,c)))
# print(sorted(c,key=lambda x:x["time"]))
# def f(a,b):
#     return lambda x:a*x+b
# z=f(3,3)
# print(z(4))
#50
# import random
# a_rand=random.randint(0,19)
# print(a_rand)
#51
#位运算符，按照二进制进行计算
#52
#53
#54
#55
#56
#57
#58
#59
# def f():
#     for i in range(100,1000):
#         i_3=i//100
#         i_2=i//10%10
#         i_1=i%10
#         print("{},{},{}".format(i_3,i_2,i_1))
# f()
#60
# def f():
#     k=0
#     str_=input("输入:")
#     print(len(str_))
#     for i in str_:
#         k+=1
#     print(k)
# f()
#61
# b=[[1],]
# for i in range(0,5):
#     c=[]
#     for j in range(0,i+1):
#         if j==0:
#             c.append(b[i][j])
#         if j<=i-1:
#             c.append(b[i][j]+b[i][j+1])
#     c.append(1)
#     b.append(c)
# print(b)
# for i in b:
#     for k in i:
#         print(k,end=" ")
#     print()
# print(b)

# b=[]
# for i in range(0,5):
#     c=[]
#     for j in range(0,i):
#         if j==0:
#             c.append(b[i-1][j])
#         if j<=i-2:
#             c.append(b[i-1][j]+b[i-1][j+1])
#     c.append(1)
#     b.append(c)
# print(b)
# for i in b:
#     for k in i:
#         print(k,end=" ")
#     print()
# print(b)


#62
# def f():
#     a=input("字符串1:")
#     b=input("字符串2:")
#     print(a.find(b))
# f()
#63
#64
#65
#66
# def f():
#     d=[]
#     a=int(input("a:"))
#     b=int(input("b:"))
#     c=int(input("c:"))
#     d.extend([a,b,c])
#     d.sort(reverse=True)
#     print(d)
# f()
#67
# def f():
#     c=[]
#     for i in range(6):
#         a=int(input("输入数字:"))
#         c.append(a)
#     c1 = c
#     print(c)
#     for i_1 in range(6):
#         for i_2 in range(i_1,6):
#             if c1[i_1]<=c1[i_2]:
#                 k=c1[i_1]
#                 c1[i_1]=c1[i_2]
#                 c1[i_2]=k
#     max_=c.index(c1[0])
#     min_=c.index(c1[5])
#     max_1=c[0]
#     c[0]=c[max_]
#     c[max_]=max_1
#
#     min_1 = c[5]
#     c[5] = c[min_]
#     c[min_] = min_1
#     print(c)
# f()
#68
# def f(m,n):
#     c=[]
#     b=[]
#     for i in range(m):
#         a=input("输入:")
#         c.append(a)
#     for i in range(n,m):
#         b.append(c[i])
#     for i in range(n):
#         b.append(c[i])
#     print(b)
# f(8,4)
#69
# def people_3(a):
#     j=0
#     list_a=[x for x in range(1,a+1)]
#     i=0
#     while i<len(list_a):
#         j+=1
#         if j==3:
#             list_a.remove(list_a[i])
#             j=0
#             i-=1
#         if i==len(list_a)-1:
#             i=-1
#         i+=1
#         if len(list_a)==1:
#             print(list_a)
#             break
# people_3(4)
#70
# if __name__=="__main__":
#     a=input("输入:")
#     print(len(a))
# 71
# d = {}
# def write():
#     print(type(d))
#     for i in range(5-len(d)):
#         a=input("输入键名:")
#         if a == "0":
#             break
#         b=input("输入键值:")
#         # d.update({a:b})
#         d.update([(a,b)])
#     print(d)
# def read():
#     a = input("输入键名:")
#     for key,value in d.items():
#         if a==key:
#             print(key,":",value)
# write()
# read()
# a={"q":1,"w":"2"}
# for key,value in a.items():
#     if "w"==key:
#         print(key,":",value)
#72
# def f():
#     c=[]
#     for i in range(3):
#         a=int(input("输入:"))
#         c.append(a)
#     print(c)
# f()
#73
# def f():
#     a=input("输入")
#     len_a=len(a)
#     for i in range(len_a):
#         print(a[len_a-i-1],end="")
# f()
#74
# def f():
#     a=list(input("输入:"))
#     b=list(input("输入:"))
#     a.sort()
#     b.sort()
#     print(a+b)
# f()
#75
# for i in range(5):
#     n = 0
#     if i != 1: n += 1
#     if i == 3: n += 1
#     if i == 4: n += 1
#     if i != 4: n += 1
#     if n == 3: print(64 + i)
#76
# def f(a):
#     sum_a=0
#     if a%2==0:
#         for i in range(1,a//2+1):
#             sum_a+=(1/(2*i))
#     else:
#         for i in range(1,a//2+1):
#             sum_a+=1/2*i+1
#     print(sum_a)
# f(6)
#77
# def f():
#     a=list(input())
#     for i in a:
#         print(i,end="")
# f()
#78
# def f():
#     dic={'a':1,'f':2,'c':3,'h':0}
#     sorted(dic.items(),key=lambda x:x[1])
#     print(dic)
# f()
# a={"001":{"name":"张三","age":12},
#         "002":{"name":"李四","age":22},
#         "003": {"name": "王二", "age": 19}}
#79
# def f():
#     a=input("")
#     b=input("")
#     c=input("")
#     if a>b :  a,b=b,a
#     if a>c:   a,c=c,a
#     if b>c:   b,c=c,b
#     print(a,b,c)
# f()
#80
# def f():
#     for i in range(3120,4000):
#         flag = 1
#         k=i
#         for j in range(5):
#             if i%5==1:
#                 i=(i//5)*4
#             else:
#                 flag=-1
#                 break
#         if flag==1:
#             print(k)
# f()
#81:
# def f():
#     a=809
#     for i in range(10,100):
#         if (a*i==800*i+9*i) and (9000<a*i<10000):
#             print(a*i)
# f()
#82
# def f(a):
#     c=[]
#     while True:
#         x1=a//8
#         x2=a%8
#         c.append(x2)
#         a=x1
#         if x1<8:
#             c.append(x1)
#             break
#     for i in range(len(c)):
#         print(c[len(c)-i-1],end="")
# f(28)
#83
# def f():
#     for i in range(0,7):
#         if i==0:
#             print("4")
#         elif i == 1:
#             print("28")
#         else:
#             print(7*(8**(i-1))*4)
# f()
#84
# def f(a):
#     c=[]
#     for i in range(a):
#         b=input("")
#         c.append(b)
#     print("--".join(c))
# f(3)
#85
# def f():
#     a=int(input("输入奇数:"))
#     for i in range(1,10):
#         z = 0
#         for j in range(0,i):
#             z+=9*(10**j)
#         # print(z)
#         if z%a==0:
#             print(z)
#             break
# f()
#86
# def f():
#     a=input("字符串:")
#     b = input("字符串:")
#     print("{}-{}".format(a,b))
#     print(a+b)
#     print("-".join(a))
# f()
#87
# class A():
#     var=1
#     var2="a"
#     def f(self,c):
#         c.var=3
#         c.var2="c"
# a=A()
# a.var=10
# a.var2="asd"
# a.f(a)
# print(a.var)
# print(a.var2)
#88
# a=int(input("一:"))
# print(a*"*")
#89
# def f():
#     a=input("")
#     a=list(a)
#     c=[]
#     for i in a:
#         i=(int(i)+5)%10
#         c.append(i)
#     print(c)
#     c[0],c[3]=c[3],c[0]
#     c[1],c[2]=c[2],c[1]
#     print(c)
# f()
#90
# list.append()
# list.extend([])
# list.insert(index,num)
# list.remove()
# list.pop()
# del list()
# list.index()
# list.count()
# list.sort()
# sorted(list,lambda x:)
#91
#time模块
#92
# import time
# def f():
#     start=time.time()
#     time.sleep(1)
#     end=time.time()
#     print(end-start)
# f()
#93
#94
#95
#96
# def f():
#     a=input()
#     b=input()
#     print(a.count(b))
# f()
#97
# def f():
#     a=input()
#     for i in a:
#         if i!="#":
#             print(i,end="")
#         else:
#             break
# f()
#98
# def f():
#     a=input()
#     a=a.upper()
#     with open(r"C:\Users\Administrator\Desktop\1.txt","w") as f:
#         f.write(a)
# f()
#99
# with open (r"C:\Users\Administrator\Desktop\1.txt","r") as f1:
#     cont1=f1.read()
# with open(r"C:\Users\Administrator\Desktop\2.txt", "r") as f2:
#     cont2=f2.read()
#     l=list(cont1+cont2)
#     l.sort()
#     print(l)
#     s="-".join(l)
#     print(s)
# with open(r"C:\Users\Administrator\Desktop\3.txt", "w") as f3:
#     f3.write(str(s))

#100
# def f():
#     a=list(input())
#     b=list(input())
#     c=dict(zip(a,b))
#     print(c)
# f()
# i = ['a', 'b']
# l = [1, 2]
# a=dict([i,l])
# print (a)