A:Contest Seating
B:一元多项式求导
C:删除相同元素
D:蜘蛛纸牌
E:稀疏矩阵
F:二维数组
G:IBM Minus One
H:Palindromes
I:代码抄袭
J:人见人爱A-B
参考代码和解析请看博客:https://blog.csdn.net/captainfly_/article/details/127892353?spm=1001.2014.3001.5502