Improved template with macro for present, cpresent and size #26
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I read about these macros in this TopCoder Article and found them to be really useful. Many times we encounter situations where we need to check whether an element is present in the container or not.
sz(a) finds the number of elements in container a.
present(c,x) macro uses the find member function of maps and sets works in O(logN) time.
cpresent(c,x) macro uses the global find algorithm (valid for all containers) and works in O(N) time.
Regards,
A follower of @rachitiitr 's Youtube Channel.