坏键问题
A1113 Integer Set Partition (25 point(s))
简单题,使 ∣S1−S2∣最小
A1114 Family Property (25 point(s))
并查集应用
A1115 Counting Nodes in a BST (30 point(s))
二叉查找树建树,层序
A1116 Come on! Let's C (20 point(s))
map应用,素数判断
A1117 Eddington Number (25 point(s))
简单推理
A1118 Birds in Forest (25 point(s))
并查集的应用
A1119 Pre- and Post-order Traversals (30 point(s))
先序+后序=中序
A1120 Friend Numbers (20 point(s))
数字各位相加
A1121 Damn Single (25 point(s))
map充当散列,记录访客对应couple