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                # 矩陣元素的總和,其中每個元素是行和列的整數除法 > 原文: [https://www.geeksforgeeks.org/sum-matrix-element-element-integer-division-row-column/](https://www.geeksforgeeks.org/sum-matrix-element-element-integer-division-row-column/) 考慮一個 **NXN** 矩陣,其中每個元素都是行號除以列號(整數除法),即 mat [i] [j] = floor((i + 1)/(j + 1))其中 0 < = i < n 和 0 < = j < n。 任務是找到所有矩陣元素的和。 **示例**: ``` Input : N = 2 Output : 4 2 X 2 matrix with given constraint: 1 0 2 1 Sum of matrix element: 4 Input : N = 3 Output : 9 ``` **方法 1(暴力)**: 運行兩個循環,一個循環用于行,另一個循環用于列,并找到(i / j)的整數部分,然后添加到答案中。 以下是此方法的實現: ## C++ ```cpp // C++ program to find sum of matrix element // where each element is integer division of // row and column. #include<bits/stdc++.h> using namespace std; // Return sum of matrix element where each element // is division of its corresponding row and column. int findSum(int n) { ????int ans = 0; ????for (int i = 1; i <= n; i++)?? // for rows ????????for (int j = 1; j <= n; j++) // for columns ????????????ans += (i/j); ????return ans; } // Driven Program int main() { ????int N = 2; ????cout << findSum(N) << endl; ????return 0; } ```
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