rust_find_missing

fn find_missing(arr1:&[i32],arr2:&[i32])->Vec<i32>{
    let mut n:Vec<i32>=Vec::new();
    //let v: Vec<i32> = Vec::new();
    let mut b:&[i32]=arr1;
    let mut s:&[i32]=arr2;
    if(arr2.len()>arr1.len()){
        b=arr2;
        s=arr1;
    }
    let mut flag=true;
    for v1 in b.iter(){
        flag=true;
        for v2 in s.iter(){
            if v1==v2{
                flag=false;
                break;
            }
        }
        if flag==true{
            n.push(*v1);
        }
    }
    return n;
}
fn main() {
    let result = find_missing(&[4,12,9,5],&[4,9,12,6,17,21]);
    println!("misssing is {:?}", result);
}