题解 | #[NOIP2010]数字统计#
[NOIP2010]数字统计
https://www.nowcoder.com/practice/179d9754eeaf48a1b9a49dc1d438525a
L,R = map(int,input().split())
sum = 0
for i in range(L,R + 1):
count = str(i).count('2')
sum += count
print(sum)
[NOIP2010]数字统计
https://www.nowcoder.com/practice/179d9754eeaf48a1b9a49dc1d438525a
L,R = map(int,input().split())
sum = 0
for i in range(L,R + 1):
count = str(i).count('2')
sum += count
print(sum)
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