2663 Tri Tiling (1)
1160 Post Office (2)
2033 Alphacode (2)
1159 Palindrome (3)
1050 To the Max (4)
2430 Lazy Cows (7)
2066 Minimax Triangulation (8, challenge problem)
Hint: The edge between vertex 1 and must be a part of some triangle.
Another hint: Use interval DP.
1038 Bugs Integrated, Inc. (9, challenge problem)
Hint: How can Problem 2663 help you?