题解 | #[NOIP2010]数字统计#
[NOIP2010]数字统计
https://www.nowcoder.com/practice/179d9754eeaf48a1b9a49dc1d438525a
我太无聊了
系统最多只能递龟997遍
def f(l,r,sum = 0):
count = str(l).count('2')
sum += count
if l == r:
return sum
return f(l + 1,r,sum = sum)
L,R = map(int,input().split())
print(f(L,R))
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