题目

题解

class Solution {
    public int[][] construct2DArray(int[] original, int m, int n) {
        int size = original.length ;
        if(size != m * n) return new int[0][0];
        int[][] res = new int[m][n];
        int i = 0, row = 0,col = 0;
        while( i < size ) {
            col = i % n;
            row = i / n;
            res[row] [col] = original[i++];
        }
        return res;
    }
}