题解 | #[NOIP2010]数字统计#
[NOIP2010]数字统计
https://www.nowcoder.com/practice/179d9754eeaf48a1b9a49dc1d438525a
l, r = list(map(int, input().split()))a = []for i in range(l, r+1): a.append(str(i))print(''.join(a).count('2'))
[NOIP2010]数字统计
https://www.nowcoder.com/practice/179d9754eeaf48a1b9a49dc1d438525a
l, r = list(map(int, input().split()))a = []for i in range(l, r+1): a.append(str(i))print(''.join(a).count('2'))
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