Day 7 / 735 min
Try a small assessment
Choose an approach for two unseen problems, then explain its time and space costs.
Unranked rehearsal
Solve both on LeetCode in 25 minutes without hints.
Your two problems
Review your attempt
After the 25-minute rehearsal, check your submissions on LeetCode. For each problem, record whether you solved it unaided, needed a hint, or need another attempt.
Revisit the hashing lesson