Algorithms and Data Structures : 6th International Workshop WADS’99 Vancouver Canada August 11–14 1999 Proceedings This book constitutes the refereed proceedings of the 6th International Workshop on Algorithms and Data Structures WADS99 held in Vancouver Canada in August 1999.The 32 revised papers presented were carefully reviewed and selected from a total of 71 submissions. Among the topics covered are data structures and algorithmic aspects in a variety of areas such as graph theory networking load balancing optimization approximation sorting and searching pattern matching information retrieval computational mathematics etc