#include <stdio.h>
int Find_ChileArray(int A[], int low, int mid, int high)
{
int left_sum = -0xff;
int sum = 0;
for (int i = mid; i >= low; i --)
{
sum += A[i];
if (sum >left_sum)
{
left_sum = sum;
}
}
int right_sum = -0xff;
sum = 0;
for (int j = mid + 1; j <= high; j ++)
{
sum += A[j];
if (sum > right_sum)
{
right_sum = sum;
}
}
return left_sum + right_sum;
}
int Find_PartMaxSubArray(int A[], int low, int high)
{
int left_sum, right_sum, cross_sum;
if (high == low)
{
return A[low];
}
else
{
int mid = (low + high) / 2;
left_sum = Find_PartMaxSubArray(A, low, mid);
right_sum = Find_PartMaxSubArray(A, mid + 1, high);
cross_sum = Find_ChileArray(A, low, mid, high);
if (left_sum >= right_sum && left_sum >= cross_sum)
{
return left_sum;
}
else if (right_sum >= left_sum && right_sum >= cross_sum)
{
return right_sum;
}
else
{
return cross_sum;
}
}
}
int main()
{
int A[100];
int n;
printf("请输入数组中数的个数:");
scanf("%d",&n);
printf("请输入数组中的数：");
for (int i = 0; i < n; i ++)
{
scanf("%d",&A[i]);
}
printf("最大子序列的和为：%d
",Find_PartMaxSubArray(A, 0, n - 1));
return 0;
}
