Published Jan 26, 2022
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Given an array nums with n objects colored red, white, or blue, sort them
in-place so that objects of the same color are adjacent, with the colors in the
order red, white, and blue.
We will use the integers 0, 1, and 2 to represent the color red, white, and blue, respectively.
You must solve this problem without using the library’s sort function.
Input: nums = [2,0,2,1,1,0]
Output: [0,0,1,1,2,2]
Input: nums = [2,0,1]
Output: [0,1,2]
- n == nums.length
- 1 <= n <= 300
- nums[i] is either 0, 1, or 2.
/**
Do not return anything, modify nums in-place instead.
*/
function sortColors(nums: number[]): void {
const swap = (i: number, j: number): void => {
let temp: number = nums[i];
nums[i] = nums[j]
nums[j] = temp;
}
let l: number = 0;
let r: number = nums.length - 1;
let i: number = 0;
while(i <= r){
if(nums[i] === 0) {
swap(l, i);
l++;
}else if(nums[i] === 2){
swap(r, i);
r--;
i--;
}
i++;
}
};