python12.5作业

s=‘python的创始人是Guido‘
l=len(s)
print(s[11:16])
print(s[15:10:-1])
print(s[0]+s[3]+s[6]+s[9]+s[12]+s[15])

a=‘你‘
b=‘最帅‘print(a+b)
print(a+b+b*2)

            import
             random
i=0
while i<10:
    a=random.randint(0,1000)
    if a>99:
        if a%10==a//100:
            print(a)
    else:
        if a%10==a//10:
            print(a)
        
    i+=1

            for g in range(1,20):
    for m in range(1,33):
        x=100-g-m
        if(x%3==0 and 5*g+3*m+x/3==100):
            print("公鸡有%d只，母鸡有%d只，小鸡有%d只"%(g,m,x))

s=input(‘读入一个字符串:‘)
count1=0
count2=0
for i in range(len(s)):
    if‘a‘<=s[i]<=‘z‘or‘A‘<=s[i]<=‘Z‘:
        count1+=1
    elif‘0‘<=s[i]<=‘9‘:
        count2+=1
print(count1,count2)