61 tags in total
AGC Series Binary Search Centroid Decomposition Centroid Tree Convex Hull DP DP: state design DSU on tree Dilworth's theorem EGF FFT FWT GCD inversion HLD Hall's Theorem Hall's marriage theorem (quantitative version) Inclusion-Exclusion Principle MGF Network Flow OGF Pigeonhole principle Polya Counting Set Power Series bitmask bubble sort casework construction counting data structure difference divide and conquer FFT divide-and-conquer dynamic DP dynamic divide and conquer elimination fft games graph graph matching greedy invariants linear-basis math matrix min-cost-flow monotonic stack multi-query binary search number theory observation path-2D permutations randomize reversal searching sec segment tree segment-tree subset DP (graph) sweep line useful algorithms weighted-minimum-edge-cover