Finding Lowest Common Ancestors (O(log N) solution where N is number of nodes). Graph Algorithms: Finding connected components and transitive closures. Our programming contest judge accepts solutions in over 55+ programming languages. Preparing for coding contests were never this much fun!
Indikator zig-zag ialah salah satu indikator yang sering digunakan dalam perdagangan. Pengukur ini membentuk golongan di grafik harga yang terdiri dari berbagai-bagai laku dan kadang-kadang muncul di grafik.
A zig zag sequence is one that alternately increases and decreases. So, 1 3 2 is zig zag, but 1 2 3 is not. Any sequence of one or two elements is zig zag. We need to find the longest zig zag subsequence in a given sequence. Subsequence means that it is not necessary for elements to be contiguous, like in the longest increasing subsequence problem.
A sequence with fewer than two elements is trivially a zig-zag sequence. For example, 1,7,4,9,2,5 is a zig-zag sequence because the differences (6,-3,5,-7,3) are alternately positive and negative. In contrast, 1,4,7,2,5 and 1,7,4,5,5 are not zig-zag sequences, the first because its first two differences are positive and the second because its ...
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