Problem A: Beautiful Strings
Approach: [Explanation]Problem B: Worms Evolution
Approach: [Explanation]Problem C: Spy Detected!
Approach: [Explanation]Problem D: Nuts
Approach: [Explanation]Problem E: Hit and Blow
Approach: [Explanation]Problem F: February 5
Approach: [Explanation]Next: Contest #3 Editorial
Move on to the next set of contest solutions.