LeetCode-53-Maximum Subarray(最大和子串)

Q:

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.

Analysis:

题目较容易理解，求数组中最大和子串，返回和。

比较好想到用动态规划，dp[i]=max{sum[i],sum[i]+num[i+1]}

Code:

public class Solution {
public int maxSubArray(int[] nums) {
if(nums.length==0||nums==null){
return 0;
}
int max=nums[0];
int sum=nums[0];
for(int i=1;i<nums.length;i++){
sum=Math.max(nums[i], nums[i]+sum);
max=Math.max(max,sum);
}
return max;
}
}