Invited papers -- Algebraic Theory of Promise Constraint Satisfaction Problems, First Steps -- Some Observations on Dynamic Random Walks and Network Renormalization -- Highly Succinct Dynamic Data Structures -- Formal methods -- Largest Common Prefix of a Regular Tree Language -- Winning Strategies for Streaming Rewriting Games -- Nominal Syntax with Atom Substitutions: Matching, Unification, Rewriting -- Two characterizations of finite-state dimension -- Complexity -- Optimal channel utilization with limited feedback -- Deterministic Preparation of Dicke States -- Complete Disjoint coNP-Pairs but no Complete Total Polynomial Search Problems Relative to an Oracle -- On Weisfeiler-Leman Invariance: Subgraph Counts and Related Graph Properties -- Algorithms -- An Efficient Algorithm for the Fast Delivery Problem -- Extension of some edge graph problems: standard and parameterized complexity -- Space Efficient Algorithms for Breadth-Depth Search -- Circular Pattern Matching with k Mismatches -- Succinct Representations of Finite Groups -- On the Tractability of Covering a Graph with 2-Clubs -- On Cycle Transversals and Their Connected Variants in the Absence of a Small Linear Forest -- Maximum rectilinear convex subsets -- Computing Digraph Width Measures on Directed Co-Graphs -- Fault-tolerant parallel scheduling of arbitrary length jobs on a shared channel -- Rare Siblings Speed-up Deterministic Detection and Counting of Small Pattern Graphs -- Bivariate B-splines from convex pseudo-circle configurations -- The Fault-Tolerant Metric Dimension of Cographs.