==code(rs) |
use std::string::String;
use std::io;

use std::process::exit;

fn find_permutation(n: i32) -> Vec<i32> {
  let mut res : Vec<i32> = Vec::new();

  let mut text = String::new();
  io::stdin().read_line(&mut text).expect("Failed to read line!");

  text.trim().parse().expect("Expected number!")

  let val = text.trim().parse().expect("Expected number!");
 
	if val == -1 {
		exit(0);
	}
 
	val

}
fn query(a: String, b: String) -> i32 {

  for _i in 0..t {
    let n = read_i32();

    let perm = find_permutation(n);

 
		if n == -1 {
    	exit(0);
		}
 
		let perm = find_permutation(n);

    print!("! ");
    for element in perm {

  	print!("\n");
	}
}

==