摘要： solution: The basic idea here is to label all appeared numbers in the array. Since we don't want to introduce extra space and given all numbers are po 阅读全文

摘要： bitset 的下标计数问题 example: 运行这个程序可以看到虽然bitset的pattern在屏幕上是从右边开始的，也就是5的bitset是0000...00101 但是在下标上，bs[0]=1, bs[1]=0, bs[2]=1, ... 而不是bs[31]=1, bs[30]=0, bs 阅读全文