for循环语句与程序实现

(1) 

s = input("输入一个字符")
n = 1
ss = ""

for i in range(1,len(s)):             
    if s[i] == s[i-1]:
        n+=1
    else:
        ss = ss + str(n)+s[i-1]
        n = 1
ss = ss + str(n)+s[len(s)-1]


print(ss)

(2)

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