Can you solve this real interview question? Range Sum Query 2D - Immutable - Given a 2D matrix matrix, handle multiple queries of the following type: * Calculate the sum of the elements of matrix inside the rectangle defined by its upper left corner (r
Range Sum Query 2D - Immutable Given a 2D matrix matrix, find the sum of the elements inside the rectangle defined by its upper left corner (row1, col1) and lower right corner (row2, col2).The above rectangle (with the red border) is defined by (row1, col1) = (2, 1) and (...
LeetCode-Range Sum Query 2D - Immutable Given a 2D matrixmatrix, find the sum of the elements inside the rectangle defined by its upper left corner (row1,col1) and lower right corner (row2,col2). The above rectangle (with the red border) is defined by (row1, col1) =(2, 1)and ...
Given a 2D matrix matrix, find the sum of the elements inside the rectangle defined by its upper left corner (row1, col1) and lower right corner (row2, col2). Range Sum Query 2D The above rectangle (with the red border) is defined by (row1, col1) = (2, 1) and (row2, col2...
LeetCode "Range Sum Query 2D - Immutable",Yestheaccu*isnotnecessary:)classNumMatrix{vector>dp;public:NumMatrix(vector>&matrix){inth=matrix.size();if(!h)ret...
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https://leetcode.com/problems/range-sum-query-2d-mutable/discuss/75870/Java-2D-Binary-Indexed-Tree-Solution-clean-and-short-17ms class NumMatrix { int N, M; int[][] bitTree; int[][] matrix; public NumMatrix(int[][] matrix) { if (matrix == null || matrix.length == 0 || matri...
https://leetcode.com/problems/range-sum-query-2d-mutable/description/ image.png 一般需要求一个区间的和,并且需要动态更新区间里的值。不是树状数组就是线段树了。这道题我用树状数组解了。 int[][]parent;int[][]ma;inth;intl;privateintlowbit(inti){returni&(-i);}privatevoidadd(inty,intx,intdel...
LeetCode-3/C++/range-sum-query-2d-immutable.cpp Go to file 41 lines (35 sloc) 1.08 KB Raw Blame // Time: ctor: O(m * n), // lookup: O(1) // Space: O(m * n) class NumMatrix { public: NumMatrix(vector<vector<int>> &matrix) { if (matrix.empty()) { return; } const...
Golang中如何实现Range Sum Query - Immutable功能? 在Leetcode 303题中,Golang的解法有哪些优化技巧? Golang实现Range Sum Query - Immutable时,时间复杂度是多少? 版权声明:原创勿转 https://cloud.tencent.com/developer/article/1412946 思路 保存一个slice code 代码语言:javascript 代码运行次数:0 运行 AI...