Invited Talks.- Algorithmic Barriers from Phase Transitions in Graphs.- Algorithmic Graph Minors and Bidimensionality.- Regular Talks.- Complexity Results for the Spanning Tree Congestion Problem.- max-cut and Containment Relations in Graphs.- The Longest Path Problem is Polynomial on Cocomparability Graphs.- Colorings with Few Colors: Counting, Enumeration and Combinatorial Bounds.- On Stable Matchings and Flows.- Narrowing Down the Gap on the Complexity of Coloring P k -Free Graphs.- Computing the Cutwidth of Bipartite Permutation Graphs in Linear Time.- Solving Capacitated Dominating Set by Using Covering by Subsets and Maximum Matching.- Efficient Algorithms for Eulerian Extension.- On the Small Cycle Transversal of Planar Graphs.- Milling a Graph with Turn Costs: A Parameterized Complexity Perspective.- Graphs that Admit Right Angle Crossing Drawings.- Kernelization Hardness of Connectivity Problems in d-Degenerate Graphs.- On the Boolean-Width of a Graph: Structure and Applications.- Generalized Graph Clustering: Recognizing (p,q)-Cluster Graphs.- Colouring Vertices of Triangle-Free Graphs.- A Quartic Kernel for Pathwidth-One Vertex Deletion.- Network Exploration by Silent and Oblivious Robots.- Uniform Sampling of Digraphs with a Fixed Degree Sequence.- Measuring Indifference: Unit Interval Vertex Deletion.- Parameterized Complexity of the Arc-Preserving Subsequence Problem.- From Path Graphs to Directed Path Graphs.- Connections between Theta-Graphs, Delaunay Triangulations, and Orthogonal Surfaces.- Efficient Broadcasting in Random Power Law Networks.- Graphs with Large Obstacle Numbers.- The Complexity of Vertex Coloring Problems in Uniform Hypergraphs with High Degree.- The Number of Bits Needed to Represent a Unit Disk Graph.- Lattices and Maximum FlowAlgorithms in Planar Graphs.