53. Maximum Subarray
Easy
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.
package leetcode.easy;
public class MaximumSubarray {
@org.junit.Test
public void test() {
int[] nums = { -2, 1, -3, 4, -1, 2, 1, -5, 4 };
System.out.println(maxSubArray(nums));
}
public int maxSubArray(int[] nums) {
int max = nums[0];
int count = 0;
for (int i = 0; i < nums.length; i++) {
if (nums[i] > max) {
max = nums[i];
}
count = nums[i];
for (int j = i + 1; j < nums.length; j++) {
count += nums[j];
if (count > max) {
max = count;
}
}
}
return max;
}
}