PAT甲级1016Phone Bills

02-02

PAT甲级1138Postorder Traversal

09-08

PAT甲级1143Lowest Common Ancestor

09-07

PAT甲级1151LCA in a Binary Tree

09-07

PAT甲级1139First Contact

09-01

PAT甲级1154Vertex Coloring

08-30

PAT甲级1137Final Grading

08-28

PAT甲级1141PAT Ranking of Institutions

08-11

PAT甲级1153Decode Registration Card of PAT

08-10

PAT甲级1144The Missing Number

08-06