rustgym 0.2.0

rustgym solutions
Documentation 
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struct Solution;

impl Solution {
    fn find_complement(num: i32) -> i32 {
        let mut mask = !0;
        while mask & num != 0 {
            mask <<= 1;
        }
        !mask & !num
    }
}

#[test]
fn test() {
    assert_eq!(Solution::find_complement(5), 2);
    assert_eq!(Solution::find_complement(1), 0);
}