LeetCode 3286. Find a Safe Walk Through a Grid
biweekly contest 139。 比賽時馬上連想到相似題 2290. minimum obstacle removal to reach corner。 隔了兩年還有印象，感覺真不錯。
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LeetCode 3285. Find Indices of Stable Mountains
biweekly contest 139。
LeetCode 3283. Maximum Number of Moves to Kill All Pawns
weekly contest 414。
LeetCode 3282. Reach End of Array With Max Score
weekly contest 414。 感覺最近常常出這種直覺秒殺題，如果認真思考反而會掉入陷阱。
LeetCode 3281. Maximize Score of Numbers in Ranges
weekly contest 414。