This book constitutes the refereed proceedings of the 26th International Symposium on
Algorithms and Computation ISAAC 2015 held in Nagoya Japan in December 2015. The 65 revised
full papers presented together with 3 invited talks were carefully reviewed and selected from
180 submissions for inclusion in the book. The focus of the volume is on the following topics:
computational geometry data structures combinatorial optimization and approximation
algorithms randomized algorithms graph algorithms and FPT computational complexity graph
drawing and planar graphs online and streaming algorithms and string and DNA algorithms.
