package cap3

// Work2 返回给定数组的偏移布局矩阵
func Work2(nums []int) [][]int {
    n := len(nums)
    result := make([][]int, n)
    for i := 0; i < n; i++ {
        result[i] = make([]int, n)
    }

    colStart := 0
    for _, num := range nums {
        for row, col := 0, colStart; row < n; row++ {
            result[row][col%n] = num
            col++
        }

        colStart++
    }

    return result
}

// Work2type2 返回给定数组的偏移布局矩阵，另一种写法
func Work2type2(nums []int) [][]int {
    n := len(nums)
    result := make([][]int, n)
    for i := 0; i < n; i++ {
        result[i] = make([]int, n)
    }

    offset := 0
    for row := 0; row < n; row++ {
        for col := 0; col < n; col++ {
            result[row][(offset+col)%n] = nums[col]
        }
        offset++
    }

    return result
}