477. 汉明距离总和

/**
 * @param {number[]} nums
 * @return {number}
 */
var totalHammingDistance = function(nums) {
    let n = nums.length;
    let max = Math.max(...nums).toString(2).length;
    let count = 0;
    let res = 0;
    for(let i=0;i<max;i++){
        count = 0;
        for(let num of nums){
            count += (num>>i)&1;
        }
        res += count * (n-count);
    }
    return res;
};

let nums = [4, 14, 2]
console.log(nums, totalHammingDistance(nums));