package main
import (
"fmt"
)
func FIND_MAX(Slice []int,low,mid,high int) (int,int,int){
left_sum:= -99999
sum :=0
max_left:=mid
for i:=mid ;i >= low ;i-- {
sum += Slice[i]
if sum > left_sum{
left_sum = sum
max_left = i
}
}
right_sum := -99999
sum = 0
max_right := mid+1
for j:=mid+1 ;j <= high ;j++ {
sum += Slice[j]
if sum > right_sum{
right_sum = sum
max_right = j
}
}
return max_left,max_right,left_sum+right_sum
}
func Testarray(a []int,low,high int) (int,int,int) {
max_left:= low
max_right := high
sum := 0
if high == low {
max_left = low
max_right = high
sum = a[low]
}else {
mid:=0
if (high-low+1)%2 ==0 {
mid = (high+low-1)/2
}else{
mid = (high+low)/2
}
left_low, left_high, left_sum := Testarray(a, low, mid)
right_low, right_high, right_sum := Testarray(a, mid+1, high)
across_left, across_right, across_sum := FIND_MAX(a, low, mid, high)
if left_sum >= right_sum && left_sum >= across_sum {
max_left = left_low
max_right = left_high
sum = left_sum
}else if right_sum >= left_sum && right_sum >= across_sum {
max_left = right_low
max_right = right_high
sum = right_sum
}else{
max_left= across_left
max_right = across_right
sum = across_sum
}
}
return max_left,max_right,sum
}
func main() {
var Slice []int
Slice = []int{2, 3, 5, 6, 7, -1, -2, 3, -6, 10, -7, 1}
low, high, sum := Testarray(Slice, 0, len(Slice)-1)
fmt.Println(low,high,sum)
}
Golang 分治法求切片最大子数组
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转载自blog.csdn.net/zhangyexinaisurui/article/details/81592687
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