https://leetcode.cn/problems/minimum-moves-to-equal-array-elements-ii/
class Solution {
public int minMoves2(int[] nums) {
int n=nums.length;
if(n==1) return 0;
Arrays.sort(nums);
int x=nums[n/2];
int res=0;
for(int i=0;i<n;i++){
res+=Math.abs(nums[i]-x);
}
return res;
}
}