leetcode-go/maximum_subarray/kadane's_algorithm.go

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package main
import (
"fmt"
"math"
)
// maxSubArray 給訂一組數字找到一組子陣列,這組子陣列的總和是最大的,最後 return 總和。
func maxSubArray(nums []int) int {
// 先定義目前最大的數字,最後就回傳這個數字
maxSum := math.MinInt
tmpSum := 0
for _, item := range nums {
tmpSum += item
// 更新 maxSum 為當前最大的子陣列和
maxSum = max(maxSum, tmpSum)
// 如果 tmpSum 小於 0則重置為 0從下一個元素重新開始累加
if tmpSum < 0 {
tmpSum = 0
}
}
return maxSum
}
func main() {
nums := []int{-2, 1, -3, 4, -1, 2, 1, -5, 4}
fmt.Println(maxSubArray(nums), maxSubArray(nums) == 6)
}