Min Max Sum
Minimize Ancestor Cost
String Concat
Codeforces Beta Round 58 B. Tyndex.Brome
Codeforces Beta Round 60 A. Harry Potter and Three Spells
Codeforces Beta Round 61 (Div. 2) C. Petya and File System
Manthan 2011 A. Partial Teacher
Manthan 2011 B. Restoration of the Permutation
Permutation Matrix
Path Travel