一个3行3列的矩阵(九宫格)给定6个int,h1,h2,h3,w1,w2,w3,分别代表行总和与列总和,总和范围在[3-30]试问在9宫格中填写正整数,有多少种填写方式?class Solution { public: void filter() { // tmp 1, 2, 3, 4 res[0][0] = tmp[0]; res[0][1] = tmp[1]; res[1][0] = tmp[2]; res[1][1] = tmp[3]; res[0][2] = h1 - res[0][0] - res[0][1]; res[1...