All problems
Matrices problems
8 problems: 0 easy, 8 medium and 0 hard. Start at the top; each one assumes the ones above it.
- Not startedMediumBlank out every row and column holding a zeroMatrices, Arrays
- Not startedMediumCount the islandsMatrices, Graphs
- Not startedMediumHow long until every orange has gone badMatrices, Stacks and queues, Graphs
- Not startedMediumHow many separate groups of friendsMatrices, Graphs
- Not startedMediumHow many ways down through the gridMatrices, Arrays, Dynamic programming
- Not startedMediumRead the grid in a spiralMatrices, Arrays
- Not startedMediumThe cheapest way down through the gridMatrices, Arrays, Dynamic programming
- Not startedMediumTurn the square a quarter turnMatrices, Arrays