【算法】LeetCode上一些经典好题(update@0617) - haolexiao的专栏 - CSDN博客



【算法】LeetCode上一些经典好题(update@0617) - haolexiao的专栏 - CSDN博客

13.数组中数全是1~n的范围内的题

长度为n的数组,其中元素全部为1~n,则这种题有一个通用的解法,就是,循环替换 num[num[i]] = num[i]直到不能替换为止。然后再继续。具体操作上,可以不断的做swap(num[i],num[num[i]])这样写起来代码更短,更方便。


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