ac-library-rb (rubygems): ac-library-rb is a ruby port of AtCoder Library (ACL). DSU(UnionFind), FenwickTree, PriorityQueue, Segtree, SCC, 2-SAT, suffix_array, lcp_array, z_algorithm, crt, inv_mod, floor_sum, max_flow, min_cost_flow...... 
Keywords: ac-library|atcoder|atcoder-library|data-structures|ruby|ruby-gems|ruby-port