453. Minimum Moves to Equal Array Elements

Input:
[1,2,3]

Output:
3

Explanation:
Only three moves are needed (remember each move increments two elements):

[1,2,3]  =>  [2,3,3]  =>  [3,4,3]  =>  [4,4,4]

Rust Solution

struct Solution;

impl Solution {
    fn min_moves(nums: Vec<i32>) -> i32 {
        let mut min = nums[0];
        let mut sum = 0;
        for &x in &nums {
            min = i32::min(x, min);
        }
        for &x in &nums {
            sum += x - min;
        }
        sum
    }
}

#[test]
fn test() {
    let nums = vec![1, 2, 3];
    assert_eq!(Solution::min_moves(nums), 3);
}