Author: ACMer
Given a binary tree, convert it to a string that consist of parenthesis and interests in the pre-order traversal. The empty brackets () for left sub trees can be …
Given an array of sorted integers, let’s arrange it to a highly balanced binary search tree (BST). The left nodes of a binary search tree are smaller than the …
I set the SHM size to 48G on my witness server (with 50GB RAM) and the server stopped to produce blocks with the following message: 2736622ms th_a database.cpp:2596 show_free_memory …
Who are the most popular delegatees on steem blockchain? By the time of writing, @minnowbooster has 1408 delegators on steem blockchain and @utopian-io has around 35823218 SP delegated. @steem-ua …
Two strings are isomorphic if the characters in one string can be replaced to get another one. No two characters may map to the same character. A character can …
