fn main() {
    println!("Hello, world!");
}

struct Solution {}
impl Solution {
    pub fn find_difference(nums1: Vec<i32>, nums2: Vec<i32>) -> Vec<Vec<i32>> {
        let mut a: Vec<i32> = Vec::new();
        let mut b: Vec<i32> = Vec::new();

        for i in nums1 {
            if !nums2.contains(&i) && !nums1.contains(&i) {
                a.push(i);
            }
        }
        for i in nums2 {
            if !nums2.contains(&i) && !nums1.contains(&i) {
                b.push(i);
            }
        }

        vec![a,b]

    }
}