改为回文数组

import os
import sys

# 请在此输入您的代码
n = int(input())
num = list(map(int,input().split()))
res = []
result = 0
for i in range(n//2):
    res.append(num[i]-num[n-i-1])

for i in range(1,len(res)):
    if res[i]>0 and res[i-1] > 0:
        a = min(res[i],res[i-1])
        res[i],res[i-1] = res[i]-a,res[i-1]-a
        result += a

    if res[i] <0 and res[i-1] < 0:
        b = max(res[i],res[i-1])
        res[i],res[i-1] = res[i]-b,res[i-1]-b
        result+=abs(b)
for i in res:
    result += abs(i)
print(result)

1.回文数组 - 蓝桥云课