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最新推荐文章于 2021-12-25 17:36:45 发布

a_student2015

最新推荐文章于 2021-12-25 17:36:45 发布

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本文链接：https://blog.youkuaiyun.com/a_student2015/article/details/51303601

本文探讨了恐怖分子如何通过改进时间炸弹并利用特定数字序列来增加爆炸威力的问题。面对给定的数字N，分析了如何计算包含特定子序列'49'的计数序列对爆炸威力的影响，揭示了数字序列在恐怖主义活动中的潜在风险。

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Description
The counter-terrorists found a time bomb in the dust. But this time the terrorists improve on the time bomb. The number sequence of the time bomb counts from 1 to N. If the current number sequence includes the sub-sequence "49", the power of the blast would add one point.
Now the counter-terrorist knows the number N. They want to know the final points of the power. Can you help them?

Input
The first line of input consists of an integer T (1 <= T <= 10000), indicating the number of test cases. For each test case, there will be an integer N (1 <= N <= 2^63-1) as the description.

The input terminates by end of file marker.

Output
For each test case, output an integer indicating the final points of the power.

Sample Input
3
1
50
500

Sample Output
0
1
15
Hint

From 1 to 500, the numbers that include the sub-sequence "49" are "49","149","249","349","449","490","491","492","493","494","495","496","497","498","499", so the answer is 15.