const UINF: usize = 2000000500;
const INF: i32 = 1000000500;
const LINF: i64 = 1223372036854775807;
const DIRECTION: [(i32, i32); 4] = [(1, 0), (-1, 0), (0, 1), (0, -1)];
fn main(){
    println!("Hello!");
}