题解 | 表示数字

s = input()
new_s = ""
flag = False
shuzi = set([str(i) for i in range(10)])
for _ in s:
    if _ in shuzi:
        if not flag:
            new_s +="*"
            flag = True        
    else:
        if flag:
            new_s +="*"
            flag = False
    new_s += _
if flag:
    new_s+="*"
print(new_s)

字符串 模拟