5-liner C++ using global index

  • 0
        vector<vector<int>> matrixReshape(vector<vector<int>>& nums, int r, int c) {
            int col = nums[0].size();
            if (nums.size()*col != r*c) return nums;
            vector<vector<int>> res(r, vector<int>(c));
            for (int i = 0; i < r*c; ++i) res[i/c][i%c] = nums[i/col][i%col];
            return res;

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