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免费推广,徐州seo关键词,seochan是什么意思,重庆建设工程招标投标网Problem: 840. Magic Squares In Grid 矩阵中的幻方 解题过程 耗时100%#xff0c;对正方形左上角的坐标遍历的#xff0c;然后判断是否满足条件即可累加计数 Code class Solution { public:int numMagicSquaresInside(vectorvectorint grid) {int m …Problem: 840. Magic Squares In Grid 矩阵中的幻方解题过程耗时100%对正方形左上角的坐标遍历的然后判断是否满足条件即可累加计数Codeclass Solution { public: int numMagicSquaresInside(vectorvectorint grid) { int m grid.size(), n grid[0].size(); if( min(m, n) 3 ) return 0; int sum 0, s; for(int i 0; i m - 3; i) { for(int j 0; j n - 3; j) { vectorint tr { grid[i][j] , grid[i][j1] , grid[i][j2], grid[i1][j] , grid[i1][j1] , grid[i1][j2], grid[i2][j] , grid[i2][j1] , grid[i2][j2] }; sort(tr.begin(), tr.end()); s grid[i][j] grid[i][j1] grid[i][j2]; if(tr[0]1 tr[1]2 tr[2]3 tr[3]4 tr[4]5 tr[5]6 tr[6]7 tr[7]8 tr[8]9 s grid[i1][j] grid[i1][j1] grid[i1][j2] s grid[i2][j] grid[i2][j1] grid[i2][j2] s grid[i][j] grid[i1][j] grid[i2][j] s grid[i][j1] grid[i1][j1] grid[i2][j1] s grid[i][j2] grid[i1][j2] grid[i2][j2] s grid[i][j] grid[i1][j1] grid[i2][j2] s grid[i][j2] grid[i1][j1] grid[i2][j] ) { sum ; } } } return sum; } };