Problem A: Beautiful Year
Approach: [Explanation]Problem B: Buy a Shovel
Approach: [Explanation]Problem C: Calculating Function
Approach: [Explanation]Problem D: Harry_potter
Approach: [Explanation]Problem E: Games
Approach: [Explanation]Problem F: Soso and Strings
Approach: [Explanation]Next: Contest #4 Editorial
Move on to the final contest solutions.