My screencast and commentary of GCJ 2021 Qualification Round. Problems and leaderboard: https://codingcompetitions.withgoogle...

0:00 A. Reversort
3:37 C. Reversort Engineering
12:40 B. Moons and umbrellas
17:55 D. Median Sort
1:26:18 E. Cheating Detection
1:55:37 Results, Summary

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