Leetcode 566 Reshape the Matrix

Leetcode 566 Reshape the Matrix

#include <vector>using namespace std;class Solution {public:    vector<vector<int>> matrixReshape(vector<vector<int>>& nums, int r, int c) {        if(nums.empty())            return nums;        int rsize = nums.size();        int csize = nums[0].size();        if(rsize * csize != r * c)            return nums;        vector<vector<int>> result(r,vector<int>(c));        for(int i = 0;i < rsize;i ++)        {            for(int j = 0;j < csize; j++)            {                int number = i * csize + j;//第几个数                int newi = number / c;                int newj = number % c;                result[newi][newj] = nums[i][j];            }        }        return result;    }};