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                # 數組中的最大平衡和 > 原文: [https://www.geeksforgeeks.org/maximum-equlibrium-sum-array/](https://www.geeksforgeeks.org/maximum-equlibrium-sum-array/) 給定一個數組 arr []。 在 arr []中找到前綴和的最大值,它也是索引 i 的后綴和。 **示例**: ``` Input : arr[] = {-1, 2, 3, 0, 3, 2, -1} Output : 4 Prefix sum of arr[0..3] = Suffix sum of arr[3..6] Input : arr[] = {-2, 5, 3, 1, 2, 6, -4, 2} Output : 7 Prefix sum of arr[0..3] = Suffix sum of arr[3..7] ``` **簡單解決方案**一步一步地檢查每個元素的給定條件(前綴和等于后綴和),然后返回滿足給定條件的元素的最大值。 ## C++ ```cpp // CPP program to find? // maximum equilibrium sum. #include <bits/stdc++.h> using namespace std; // Function to find? // maximum equilibrium sum. int findMaxSum(int arr[], int n) { ????int res = INT_MIN; ????for (int i = 0; i < n; i++) ????{ ????int prefix_sum = arr[i]; ????for (int j = 0; j < i; j++) ????????prefix_sum += arr[j]; ????int suffix_sum = arr[i]; ????for (int j = n - 1; j > i; j--) ????????suffix_sum += arr[j]; ????if (prefix_sum == suffix_sum) ????????res = max(res, prefix_sum); ????} ????return res; } // Driver Code int main() { ????int arr[] = {-2, 5, 3, 1,? ??????????????????2, 6, -4, 2 }; ????int n = sizeof(arr) / sizeof(arr[0]); ????cout << findMaxSum(arr, n); ????return 0; } ```
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