package main
import . "nc_tools"
/*
 * type ListNode struct{
 *   Val int
 *   Next *ListNode
 * }
 */

/**
 * 代码中的类名、方法名、参数名已经指定,请勿修改,直接返回方法规定的值即可
 *
 * 
 * @param head ListNode类 
 * @return int整型
*/
func FindGreatestSumOfSubArray( head *ListNode ) int {
    // write code here
    sum, max := head.Val, head.Val
    head = head.Next
    for head != nil {
        sum += head.Val
        if sum < head.Val {
            sum = head.Val
        }
        if sum > max {
            max = sum
        }
        head =head.Next
    }
    return max
}