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                Given an integer array`nums`, find the contiguous subarray?(containing at least one number) which has the largest sum and return its sum. **Example:** ~~~ Input: [-2,1,-3,4,-1,2,1,-5,4], Output: 6 Explanation:?[4,-1,2,1] has the largest sum = 6. ~~~ **Follow up:** If you have figured out the O(*n*) solution, try coding another solution using the divide and conquer approach, which is more subtle. **翻譯** 給定一個整數數組 nums ,找到一個具有最大和的連續子數組(子數組最少包含一個元素),返回其最大和。 **示例:** ~~~ 輸入: [-2,1,-3,4,-1,2,1,-5,4], ~~~ **進階:** 如果你已經實現復雜度為 O(n) 的解法,嘗試使用更為精妙的分治法求解。 **解法1:** ~~~ var?maxSubArray?=?function(nums)?{ if?(!nums.length)?{ return0; ?} let?maxWithEnd?=?nums[0]; let?maxSoFar?=?nums[0]; for?(let?i?=?1;?i?<?nums.length;?i++)?{ ????????maxWithEnd?=?Math.max(maxWithEnd?+?nums[i],?nums[i]); ????????maxSoFar?=?Math.max(maxSoFar,?maxWithEnd); ????} return?maxSoFar; }; ~~~ **解法2:** ``` var?maxSubArray?=?function(nums)?{ var?max?=?-Number.MAX_VALUE; var?sum?=?0; nums.forEach(function(item,?index,?array)?{ ????sum?+=?item; if?(sum?>?max) ??????max?=?sum; if?(sum?<?0) ??????sum?=?0; ??}); return?max; }; ```
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