https://blog.youkuaiyun.com/m0_73771309zh-cnhttps://blog.youkuaiyun.com/https://blog.youkuaiyun.com/m0_73771309/article/details/135900056https://blog.youkuaiyun.com/m0_73771309/article/details/135900056m0_73771309Mon, 29 Jan 2024 20:00:00 +0800https://blog.youkuaiyun.com/m0_73771309/article/details/135888860https://blog.youkuaiyun.com/m0_73771309/article/details/135888860m0_73771309Sun, 28 Jan 2024 20:00:00 +0800https://blog.youkuaiyun.com/m0_73771309/article/details/135875669https://blog.youkuaiyun.com/m0_73771309/article/details/135875669m0_73771309Sat, 27 Jan 2024 20:00:00 +0800https://blog.youkuaiyun.com/m0_73771309/article/details/135874785https://blog.youkuaiyun.com/m0_73771309/article/details/135874785m0_73771309Fri, 26 Jan 2024 21:24:45 +0800https://blog.youkuaiyun.com/m0_73771309/article/details/135854060https://blog.youkuaiyun.com/m0_73771309/article/details/135854060m0_73771309Thu, 25 Jan 2024 22:18:53 +0800 0 就返回了，因为 0 已经是确定的数了，四数之和这道题目 target是任意值。四数之和的双指针解法是两层for循环nums[k] + nums[i]为确定值，依然是循环内有left和right下标作为双指针，找出nums[k] + nums[i] + nums[left] + nums[right] == target的情况，三数之和的时间复杂度是O(n^2)，四数之和的时间复杂度是O(n^3)。这一期专栏记录将我每天的刷题，希望各位的监督，也希望和各位共勉。]]>https://blog.youkuaiyun.com/m0_73771309/article/details/135330643https://blog.youkuaiyun.com/m0_73771309/article/details/135330643m0_73771309Tue, 23 Jan 2024 22:51:40 +0800 0 就说明 此时三数之和大了，因为数组是排序后了，所以right下标就应该向左移动，这样才能让三数之和小一些。如下图：拿这个nums数组来举例，首先将数组排序，然后有一层for循环，i从下标0的地方开始，同时定一个下标left 定义在i+1的位置上，定义下标right 在数组结尾的位置上。整体寻找三数之和的代码比较容易的，最重要的还是去重的操作。双指针：首先要将nums数组进行排序。]]>https://blog.youkuaiyun.com/m0_73771309/article/details/135361612https://blog.youkuaiyun.com/m0_73771309/article/details/135361612m0_73771309Wed, 03 Jan 2024 14:15:16 +0800https://blog.youkuaiyun.com/m0_73771309/article/details/135310959https://blog.youkuaiyun.com/m0_73771309/article/details/135310959m0_73771309Sat, 30 Dec 2023 23:14:52 +0800https://blog.youkuaiyun.com/m0_73771309/article/details/135299893https://blog.youkuaiyun.com/m0_73771309/article/details/135299893m0_73771309Fri, 29 Dec 2023 23:20:19 +0800https://blog.youkuaiyun.com/m0_73771309/article/details/135280024https://blog.youkuaiyun.com/m0_73771309/article/details/135280024m0_73771309Thu, 28 Dec 2023 22:59:28 +0800https://blog.youkuaiyun.com/m0_73771309/article/details/135279212https://blog.youkuaiyun.com/m0_73771309/article/details/135279212m0_73771309Thu, 28 Dec 2023 22:47:37 +0800https://blog.youkuaiyun.com/m0_73771309/article/details/135258122https://blog.youkuaiyun.com/m0_73771309/article/details/135258122m0_73771309Wed, 27 Dec 2023 23:41:51 +0800https://blog.youkuaiyun.com/m0_73771309/article/details/135233192https://blog.youkuaiyun.com/m0_73771309/article/details/135233192m0_73771309Tue, 26 Dec 2023 23:30:40 +0800https://blog.youkuaiyun.com/m0_73771309/article/details/135211284https://blog.youkuaiyun.com/m0_73771309/article/details/135211284m0_73771309Mon, 25 Dec 2023 23:52:13 +0800https://blog.youkuaiyun.com/m0_73771309/article/details/135186885https://blog.youkuaiyun.com/m0_73771309/article/details/135186885m0_73771309Sun, 24 Dec 2023 21:49:26 +0800https://blog.youkuaiyun.com/m0_73771309/article/details/135176176https://blog.youkuaiyun.com/m0_73771309/article/details/135176176m0_73771309Sat, 23 Dec 2023 23:42:36 +0800https://blog.youkuaiyun.com/m0_73771309/article/details/135163182https://blog.youkuaiyun.com/m0_73771309/article/details/135163182m0_73771309Fri, 22 Dec 2023 23:59:52 +0800https://blog.youkuaiyun.com/m0_73771309/article/details/135143061https://blog.youkuaiyun.com/m0_73771309/article/details/135143061m0_73771309Fri, 22 Dec 2023 00:33:54 +0800https://blog.youkuaiyun.com/m0_73771309/article/details/135118650https://blog.youkuaiyun.com/m0_73771309/article/details/135118650m0_73771309Thu, 21 Dec 2023 00:00:07 +0800https://blog.youkuaiyun.com/m0_73771309/article/details/135092661https://blog.youkuaiyun.com/m0_73771309/article/details/135092661m0_73771309Tue, 19 Dec 2023 22:07:44 +0800