1006. Sign in and sign out (25) Time Limit 400 MS
The memory limit is 32000 kb.
Code length limit: 16000 B
Criterion author Chen, Yue
At the beginning of every day, the first person who signs in the computer room will unlock the door, and the last one who signs out will lock the door. given the records of signing in's and out's, you are supposed to findOnes who
One: Direct Online search Method
Most of the time we can not play the equal sign does not matter, directly in Baidu or Google search "not equal" to find relevant articles, directly copied over paste can be.
Online search is not equal to copy can
Online Search method In fact, there is a disadvantage is that your computer must be networked, no networking will not be used, so
Many Tencent computer stewards know that every day in the software check-in, you can get points. And the more diligent, will be able to be rated security up to the ranks and senior security talent level, to win Q coins and other rewards. However, many netizens do not know exactly how to earn points. Below, small make up to share with you Tencent computer Butler sign
Here we first explain the relevant laws, the situation is to take less bits of the signed storage space to remove data and put in more symbolic storage space, such as: Char→short.Rule: The original space symbol bit is repeatedly populated to the remaining bits in the new space.eg. (negative case, positive number same)char:1000 0000→short:1111 1111 1000 0000-------------------------------------------------------------------------------------------------Prove:A = (1000 0000) 2 = (-27) 10 = (-128)
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