| Name | Solution | Comments (highlight to reveal hints) |
|---|---|---|
| All about that base | Code | Just try each base carefully |
| Name | Solution | Comments (highlight to reveal hints) |
|---|---|---|
| Abstract Painting | Code | Once top and left edges are fixed, then the colours in each square are also forced |
| Name | Solution | Comments (highlight to reveal hints) |
|---|---|---|
| Almost Union-Find | Code | Operations 1 and 3 can be handled with the usual union-find data structure. To handle move, create a new node to handle the moved element |
| Hardwood Species | Code |
| Name | Solution | Comments (highlight to reveal hints) |
|---|---|---|
| A Multiplication Game | Code | All intermediate states are 2^a*3^b*5^c*7^d, so there are not that many |
| Bachet's Game | Code | |
| Exploding Batteries | Code | Once you decide where to test the first one, you have to consider the two cases: whether it explodes of not. If it does not explode, then you can recurse. |
| Bus Ticket | Code | Find the cost to take trips up to a certain point. |
| Canonical Coin Systems | Code |
| Name | Solution | Comments (highlight to reveal hints) |
|---|---|---|
| Anthony and Diablo | Code | The best shape is a circle |
| Name | Solution | Comments (highlight to reveal hints) |
|---|---|---|
| All Pairs Shortest Path | Code | Floyd, but be careful of edge cases |
| Antenna Placement | Code | If we colour the cells like a checkerboard, then each antenna covers one of each colour. Look at it as a bipartite graph and we want to find a maximum matching |
| Arctic Network | Code | This is a modification of the minimum spanning tree problem |
| Button Bashing | Code | BFS |
| Name | Solution | Comments (highlight to reveal hints) |
|---|---|---|
| 3D Printed Statues | Code | Replicate as early as possible. There is also a closed form formula |
| Bank Queue | Code | Sort based on when they have to be served. Work backward |
| Name | Solution | Comments (highlight to reveal hints) |
|---|---|---|
| Antiarithmetic? | Code | Look at the inverse of the premutation |
| Name | Solution | Comments (highlight to reveal hints) |
|---|---|---|
| Alehouse | Code | People entering and leaving are events. Scan the events and process |
| Name | Solution | Comments (highlight to reveal hints) |
|---|---|---|
| Candle Box | Code | Just try all possible age of Rita |
| Closest Sums | Code | Form the list of sums and use binary search |
| Name | Solution | Comments (highlight to reveal hints) |
|---|---|---|
| ACM | Code |
| Name | Solution | Comments (highlight to reveal hints) |
|---|---|---|
| 2048 | Code | Just simulate |
| ABC | Code | |
| Alphabet Spam | Code | |
| Ants | Code | The trick is that we can pretend the ants pass through each other instead of bouncing off |
| Avion | Code | |
| Hardwood Species | Code |