Rotate Image

1. Problem Description

Given an n x n two-dimensional matrix matrix representing an image, rotate the image 90 degrees clockwise.

2. Approach

3. Implementation

func rotate(matrix [][]int)  {
    n := len(matrix)
    tmp := make([][]int, n)
    for i := range tmp {
        tmp[i] = make([]int, n)
    }

    for i, row := range matrix {
        for j, v := range row {
            tmp[j][n-i-1] = v
        }
    }

    copy(matrix, tmp)
}

4. References

• 48. Rotate Image - LeetCode