[LeetCode] 1074. Number of Submatrices That Sum to Target 元素和為目標值的子矩陣數量
Given a matrix and a target, return the number of non-empty submatrices that sum to target. A submatrix x1, y1, x2, y2 is the set of all cells ...
原文：【leetcode】1074. Number of Submatrices That Sum to Target
題目如下： Given amatrix, and atarget, return the number of non empty submatrices that sum totarget. A submatrixx , y , x , y is the set of all cellsmatrix x y withx lt x lt x andy lt y lt y . Two submatri ...
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