Daily LeetCode threads buzzing
LeetCode-style daily practice threads are active again—examples include 'Matrix Similarity After Cyclic Shifts' and 'Equal Sum Grid Partition II' being shared with concise solutions and edge-case notes—fueling candidate grind cycles for coding screens. Students are using these micro-threads to swap patterns and testcases. (x.com/padole_vishakha/status/2037490978270118248)
Matrix Similarity After Cyclic Shifts is LeetCode problem 2946 (Easy) and is listed under Weekly Contest 373, while Equal Sum Grid Partition II is problem 3548 (Hard) and is listed under Weekly Contest 449. (leetcode.com) Problem 2946 has 116,033 accepted submissions out of roughly 156.9K attempts with a 73.9% acceptance rate on LeetCode. (leetcode.com) Problem 3548 has 6,896 accepted submissions out of about 31.1K attempts with a 22.2% acceptance rate on LeetCode. (leetcode.com) Constraints for 2946 cap mat dimensions at 25×25 and k at 50, making it amenable to O(m·n) simulation tricks; 3548’s constraints allow m and n up to 100,000 but enforce m·n ≤ 100,000, which drives the frequency-count/prefix-sum approaches used in official solutions. (leetcode.com) Step‑by‑step video walkthroughs for 2946 and 3548 were posted on the LeetCode Daily YouTube channel on Mar 26, 2026 and Mar 25, 2026 respectively, providing runtime and edge‑case walkthroughs alongside multi‑language code. (youtube.com) Community solution collections and repositories include a multi‑language README and reference implementations for 2946 in the doocs/leetcode repo and a 3548 solution file in a public LeetCode‑Solutions GitHub repo (the latter repo shows 19 forks and 97 stars). (github.com) LeetCode discussion counts for the two pages show 102 discussion threads for 2946 and 72 for 3548, reflecting active exchanges on testcases, corner cases, and pattern recognition posts in the problem threads. (leetcode.com)
