fn eps(x: &[i32],y: i32) -> i32 {
    let mut b = 0;
    while b < x.len() {
        if x[b] == y{
            return 1;
        }
        b += 1;
    }
    return 0;
}

fn main() {
    let v = [1, 2, 3];
    println!("{}",eps(&v,1));
}