题解 | 统计字符

import sys

s = input()
cd = 0
ca = 0
cno = 0
co = 0
for i in s:
    if i.isdigit():
        cd += 1
    elif i.isalpha():
        ca += 1
    elif i.isspace():
        cno += 1
    else:
        co +=1
print(ca,cno,cd,co,sep="\n")