Level 4 · Advanced

Tries

About 10 steps, from the first idea to a mastery test.

Stage 0Words as paths4 stepsFree
1. 1Does this exact word exist?10 min
2. 2Starts with8 min
3. 3How many words start with this?9 min
4. 4The longest prefix that is a word9 min
Stage 1Prefix questions4 stepsFree
1. 1Autocomplete11 min
2. 2Search with wildcards12 min
3. 3Replace with roots10 min
4. 4Distinct prefixes8 min
Stage 2Mastery2 stepsFree
1. 1The largest XOR of any two numbers13 min
2. 2Can this be spelled out?13 min

Start free Try a step first