LeetCode[JS] > 1913. Maximum Product Difference Between Two Pairs

2025. 4. 9. 23:17ยท๐Ÿ”’Algorithm

๐Ÿงฉ๋ฌธ์ œ๋งํฌ

https://leetcode.com/problems/maximum-product-difference-between-two-pairs/

๐Ÿ”จ๋ฌธ์ œํ’€์ด

์ด ๋ฌธ์ œ๋Š” ์ฒ˜์Œ์— sort๋กœ ์ •๋ ฌํ•ด์„œ 1,2๋ฒˆ์งธ๋กœ ๊ฐ€์žฅ ํฐ์ˆ˜, 1,2๋ฒˆ์งธ๋กœ ๊ฐ€์žฅ ์ž‘์€ ์ˆ˜๋“ค์„ ๋ฐ”๋กœ ์ด์šฉํ•˜๋Š” ๋ฐฉ์‹์œผ๋กœ ํ’€์—ˆ๋Š”๋ฐ ์‹œ์ž‘๋ณต์žก๋„๋ฅผ ๋” ์ตœ์ ํ™” ํ•˜๋Š”๋ฐฉ๋ฒ•์ด ์žˆ์—ˆ๊ณ  ๊ทธ ๋ฐฉ๋ฒ•์ด ์•„๋ž˜ ๋ฐฉ๋ฒ•์ด๋‹ค. ๋‹จ์ˆœํžˆ nums์˜ ๋ชจ๋“  ์›์†Œ๋“ค์„ sorting ํ•˜๋Š”๋ฐฉ์‹์€ ์‹œ๊ฐ„๋ณต์žก๋„๋‚˜ O(nlogn)์ด๊ณ  ์•„๋ž˜ ํ’€์ด์˜ ์‹œ๊ฐ„๋ณต์žก๋„๋Š” O(n)์ด๋‹ค.  ( ์ฐธ๊ณ ๋กœ js์—์„œ ์‚ฌ์šฉํ•˜๋Š” sort ํ•จ์ˆ˜์˜ ์‹œ๊ฐ„๋ณต์žก๋„๋Š” O(nlogn)์ด๋‹ค. ) 

/**
 * second try
 * time complexity O(nlogn)
 * @param {number[]} nums
 * @return {number}
 */
var maxProductDifference = function (nums) {
    let arr = nums.slice(0, 4);

    arr.sort((a, b) => b - a);

    for (let i = 4; i < nums.length; ++i) {
        let n = nums[i];

        if (n < arr[3]) {
            arr[2] = arr[3]
            arr[3] = n;            
        } else if (n < arr[2]) {
            arr[2] = n;
        } else if (n > arr[0]) {
            arr[1] = arr[0];
            arr[0] = n;
        } else if (n > arr[1]) {
            arr[1] = n ;
        }
    }

    return arr[0] * arr[1] - arr[2] * arr[3];
};

'๐Ÿ”’Algorithm' ์นดํ…Œ๊ณ ๋ฆฌ์˜ ๋‹ค๋ฅธ ๊ธ€

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'๐Ÿ”’Algorithm' ์นดํ…Œ๊ณ ๋ฆฌ์˜ ๋‹ค๋ฅธ ๊ธ€
  • LeetCode [JS] > 1004. Max Consecutive Ones III
  • LeetCode[JS] > 350. Intersection of Two Arrays II
  • LeetCode [JS] > 1496. Path Crossing
  • LeetCode [JS] > 1128. Number of Equivalent Domino Pairs
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LeetCode[JS] > 1913. Maximum Product Difference Between Two Pairs
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