struct Solution;
impl Solution {
fn wiggle_sort(nums: &mut Vec<i32>) {
let n = nums.len();
for i in 0..n {
if i % 2 == 1 {
if nums[i] < nums[i - 1] {
nums.swap(i, i - 1);
}
} else {
if i > 0 && nums[i] > nums[i - 1] {
nums.swap(i, i - 1);
}
}
}
}
}
#[test]
fn test() {
let mut nums = vec![3, 5, 2, 1, 6, 4];
Solution::wiggle_sort(&mut nums);
let res = vec![3, 5, 1, 6, 2, 4];
assert_eq!(nums, res);
}