Minimum operations to make array sum divisible by k

#[test]
fn t1() {
    let start = std::time::Instant::now();
    let val = Solution::min_operations(vec![3, 9, 7], 5);
    let expected = 4;
    log_result!(val == expected, "t1", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t2() {
    let start = std::time::Instant::now();
    let val = Solution::min_operations(vec![4, 1, 3], 4);
    let expected = 0;
    log_result!(val == expected, "t2", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t3() {
    let start = std::time::Instant::now();
    let val = Solution::min_operations(vec![3, 2], 6);
    let expected = 5;
    log_result!(val == expected, "t3", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t4() {
    let start = std::time::Instant::now();
    let val = Solution::min_operations(vec![10, 10], 5);
    let expected = 0;
    log_result!(val == expected, "t4", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t5() {
    let start = std::time::Instant::now();
    let val = Solution::min_operations(vec![7, 13, 3], 1);
    let expected = 0;
    log_result!(val == expected, "t5", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t6() {
    let start = std::time::Instant::now();
    let val = Solution::min_operations(vec![7], 3);
    let expected = 1;
    log_result!(val == expected, "t6", start, &expected, &val);
    assert_eq!(val, expected);
}