Watch tutorials and explanations by expert teachers that walk through solving this problem.
upyoursc
Coding Club Lambda
Cameron Late
moodyCode
Owen Wu
Coding Club RVCE
Encode Decode
LeetKey
comicfans44
Solve more problems to master this pattern
![my attempt at solving leetcode 3019: number of changing keys [SOLVED]](https://i.ytimg.com/vi/Dzkb8ft9TRs/hq720.jpg?sqp=-oaymwEXCNAFEJQDSFryq4qpAwkIARUAAIhCGAE=&rs=AOn4CLCWRZpFdjrkQorB1BtZReI69M5z0w)
