C. Meaningless Operations time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Can the greatest common divisor and bitwise operations have anything in common? It is time to answer this question.…
原题目 Given a non-empty array of integers, every element appears twice except for one. Find that single one. Note: Your algorithm should have a linear runtime complexity. Could you implement it without using extra memory? 普通解 刚看到的这个题目第一时间想到的就是a[i]++,最后…