【DidaOJ】[491]【C语言训练】亲密数

【DidaOJ】[492]【C语言训练】列出最简真分数序列

【HDU】[1001]Sum Problem

【HDU】[1002]A + B Problem II

【HDU】[1003]Max Sum

【HDU】[1009]FatMouse' Trade

【HDU】[1010]Tempter of the Bone

【HDU】[1022]Train Problem I

【HDU】[1040]As Easy As A+B

【HDU】[1048]The Hardest Problem Ever