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Top Forums Programming c++ code to check whether a list is circular or not Post 302446049 by binlib on Tuesday 17th of August 2010 01:01:58 PM
Old 08-17-2010
This will not detect the case when it loops back to the middle of the list. You can have two pointers starting at the head, advance one by one step, two for the other. Check if they meet.
 

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crypt_unix(5)						Standards, Environments, and Macros					     crypt_unix(5)

NAME
crypt_unix - traditional UNIX crypt algorithm DESCRIPTION
The crypt_unix algorithm is the traditional UNIX crypt algorithm. It is not considered sufficiently secure for current systems and is pro- vided for backwards compatibility. The crypt_sunmd5(5), crypt_bsdmd5(5), or crypt_bsdbf(5) algorithm should be used instead. The algorithm identifier for policy.conf(4) is __unix__. There is no entry in crypt.conf(4) for this algorithm. The crypt_unix algorithm is internal to libc and provides the string encoding function used by crypt(3C) when the first character of the salt is not a "$". This algorithm is based on a one-way encryption algorithm with variations intended (among other things) to frustrate use of hardware imple- mentations of a key search. Only the first eight characters of the key passed to crypt() are used with this algorithm; the rest are silently ignored. The salt is a two-character string chosen from the set [a-zA-Z0-9./]. This string is used to perturb the hashing algo- rithm in one of 4096 different ways. The maximum password length for crypt_unix is 8 characters. USAGE
The return value of the crypt_unix algorithm might not be portable among standard-conforming systems. See standards(5). ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |MT-Level |Safe | +-----------------------------+-----------------------------+ SEE ALSO
passwd(1), crypt(3C), crypt_genhash_impl(3C), crypt_gensalt(3C), crypt_gensalt_impl(3C), getpassphrase(3C), crypt.conf(4), passwd(4), pol- icy.conf(4), attributes(5), crypt_bsdbf(5), crypt_bsdmd5(5), crypt_sunmd5(5), standards(5) SunOS 5.10 6 Aug 2003 crypt_unix(5)
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