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readme.md

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+##
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+**binary search**
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+**union-find sets**
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+**topological sorting**
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+**knuth-morris-pratt**
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+**dijsktra**
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+**bipartite graph**
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+**mathematical method**: quickpow, prime judging, greatest common divisor
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+**binary indexed tree**
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+**minimum spanning tree**: krukal  / prime
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+**segment tree**
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+**binary search tree & AVL tree**
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+**trie tree**
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+**k-d tree**