function arrayPairSum(nums){
 nums.sort((a,b)=>a-b);
 let s=0;
 for(let i=0;i<nums.length;i+=2) s+=nums[i];
 return s;
}

function arrayPairSum(nums:number[]):number{
 nums.sort((a,b)=>a-b);
 let s=0;
 for(let i=0;i<nums.length;i+=2) s+=nums[i];
 return s;
}

package main

import "sort"

func arrayPairSum(nums []int) int {
	sort.Ints(nums)
	s := 0
	for i := 0; i < len(nums); i += 2 {
		s += nums[i]
	}
	return s
}

func main() {}

fn array_pair_sum(mut nums: Vec<i32>) -> i32 {
	nums.sort_unstable();
	nums.iter().step_by(2).sum()
}
fn main() {}