fn plusMinus(arr: &[i32]) {
    let mut pos: f32 = 0.0;
    let mut neg: f32 = 0.0;
    let mut zer: f32 = 0.0;
    let all = arr.len() as f32;
    
    for &i in arr {
        match i {
            i if i > 0 => pos += 1 as f32,
            i if i < 0 => neg += 1 as f32,
            i => zer += 1 as f32,
        }
    }
    println!("{}", pos / all);
    println!("{}", neg / all);
    println!("{}", zer / all);
}