/**
 * [48] Rotate Image
 */
pub struct Solution {}


// submission codes start here

impl Solution {
    pub fn rotate(matrix: &mut Vec<Vec<i32>>) {
        let n = matrix.len();
        
        // 首先上下水平翻转
        for i in (0..n / 2) {
            for j in 0..n {
                let t = matrix[i][j];
                matrix[i][j] = matrix[n - i - 1][j];
                matrix[n - i - 1][j] = t;
            }
        }

        // 对角线翻转
        for i in (0..n) {
            for j in (0..i) {
                let t = matrix[i][j];
                matrix[i][j] = matrix[j][i];
                matrix[j][i] = t;
            }
        }
    }
}

// submission codes end

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_48() {
    }
}