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LeetCode:Maximum Subarray

Find the contiguous subarray within an array (containing at least one number) which has the largest sum.

For example, given the array [−2,1,−3,4,−1,2,1,−5,4],
the contiguous subarray [4,−1,2,1] has the largest sum = 6.

思路:初始化sum和max值为数组首元素值,从头开始遍历数组,sum<0则将sum置为0,sum>max则更新max为sum。

 

 1 class Solution { 2     public: 3         int maxSubArray(int A[],int n) { 4             int sum=A[0],max=sum; 5             for(int i=1;i<n;i++) 6             { 7                 if(sum<0) 8                     sum=0; 9                 sum+=A[i];10                 if(sum>max)11                     max=sum;12             }13             return max;14         }15 };

 

LeetCode:Maximum Subarray