Zadanko

fn main() {
   let a:Vec<i64> = vec![1,2,8];
   let b:Vec<i64> = vec![0,5,7];
   let c:Vec<i64> = merge(a, b);
   println!("{:?}", c)
} 

fn merge(a:Vec<i64>, b:Vec<i64>) -> Vec<i64> { 
    let mut ai = a.iter();
    let mut bi = b.iter();
  
    let mut result:Vec<i64> = vec![];
    loop{
        if let (Some(ak), None) = (ai.next(), bi.next());
        if let ()
        match (ai.last(), bi.last()){
            (Some(ak), None) => {result.push(*ak); ai.next();},
            (None, Some(bk)) => {result.push(*bk); bi.next();},
            (Some(ak), Some(bk)) => if ak > bk {result.push(*ak); ai.next();} else {result.push(*bk); bi.next();},
            (None, None) => return result,
        } 
    }
   /*loop{
        match (ai.last(), bi.last()){
            (Some(ak), None) => {result.push(*ak); ai.next();},
            (None, Some(bk)) => {result.push(*bk); bi.next();},
            (Some(ak), Some(bk)) => if ak > bk {result.push(*ak); ai.next();} else {result.push(*bk); bi.next();},
            (None, None) => return result,
        } 
    }*/
}