Hash-table:Basic Idea Hashing:the idea Q:When should we use hash table? What situations is the hash table suitable for? Feasible size Very large,but only a small E[O] part is used in an applica- E[1] tion at a certain time. Key Space E[m-1] ，口+4心，。法·生，生 0a0. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hash-table: Basic Idea Hashing: the idea Q : When should we use hash table? What situations is the hash table suitable for? Key Space x Very large, but only a small part is used in an applica￾tion at a certain time. · · · · · · E [0] E [1] E [m − 1] Feasible size E [k] Hash Function Index distribution Collision handling MA Jun (Institute of Computer Software) Problem Solving May 14, 2020 3 / 34