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4 Posted Topics
 | Let say we have N number and N is odd. Among the N numbers, two of them equal to each other except one. For example, let's say we have 7 numbers, which could be 5, 3, 4, 1, 3, 5, 1. Only 4 is distinct, other number always has anther …  |
| | I have a algorithm problem to ask: There are N persons, and each of them knows one distinct gossip message. The two of them just make a phone call, so they could share messages they know. Then at least how many phone calls do they need make , so that … |
| | This code is just handling the SIGCHLD signal, but as you can see, the parent process should ignore this SIGCHLD signal according to the signal function. But in fact, the parent process will omit the signal function, and handling the child process using "wait". I wonder why the parent do … |
| | If you very care the security of your server, you could install some anti-virus software. The linux core inludes firewall itself.So you don't need to install another firewall, and all you need to do is just configure your firewall. |
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