leetcode总结2 -- 找一个特殊的数

• single number http://blog.csdn.net/xyqzki/article/details/50310895

• first missing positive number http://blog.csdn.net/xyqzki/article/details/50381994

• find the duplicate the number 抽屉原理那一题http://blog.csdn.net/xyqzki/article/details/50388768