package top100liked

import "testing"

// 爆内存
// func maxSubArray(nums []int) int {
// 	l := len(nums)
// 	msa := make([][]int, l)
// 	for i := range msa {
// 		msa[i] = make([]int, l)
// 	}
// 	res := nums[0]
// 	for i, v := range nums {
// 		msa[i][i] = v
// 		res = max(res, v)
// 	}
// 	for i := range l {
// 		for j := i + 1; j < l; j++ {
// 			msa[i][j] = msa[i][j-1] + nums[j]
// 			res = max(res, msa[i][j])
// 		}
// 	}
// 	return res
// }

func maxSubArray(nums []int) int {
	dp := make([]int, len(nums))
	dp[0] = nums[0]
	maxSoFar := nums[0]

	for i := 1; i < len(nums); i++ {
		dp[i] = max(nums[i], dp[i-1]+nums[i])
		maxSoFar = max(maxSoFar, dp[i])
	}
	return maxSoFar
}

func TestS13(t *testing.T) {
	println(maxSubArray([]int{-2, 1, -3, 4, -1, 2, 1, -5, 4}))
	println(maxSubArray([]int{1}))
	println(maxSubArray([]int{5, 4, -1, 7, 8}))
	println(maxSubArray([]int{-2, 1}))
}