/**
 * @param {number[]} nums
 * @return {void} Do not return anything, modify nums in-place instead.
 */
var sortColors = function(nums) {
    const count = {0:0, 1:0, 2:0};
    for (let num of nums) {
        count[num]++;
    }
    for (let i = 0; i < count[0]; i++) {
        nums[i] = 0;
    }
    
    for (let i = 0; i < count[1]; i++) {
        nums[count[0] + i] = 1;
    }
    
    for (let i = 0; i < count[2]; i++) {
        nums[count[1] + count[0] + i] = 2;
    }
};