fn range(range: Vec<u16>) -> String {
    let mut min = range[0];
    let mut max = range[0];
    for i in range {
        if i > max {
            max = i;
        }
        if i < min {
            min = i;
        }
    }
    format!("range() min:{}  max:{}",min,max)
}

fn main() {
    let v = vec![100, 200, 11, 554, 5055];
    println!("{}",range(v));
}