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63 lines (59 loc) ยท 1.73 KB
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/**
* TC: O(N)
* 1๋ฒ์์ N๋งํผ ์ํ
* 2๋ฒ์์ ์ต๋ N๋งํผ ์ํ
*
* SC: O(1)
* ๊ฒน์น๋ interval์ ์์, ๋ index๋ฅผ ์ ์ฅํ๋ ๋ณ์๋ง ์ฌ์ฉ
*
* N: intervals.length
*/
/**
* @param {number[][]} intervals
* @param {number[]} newInterval
* @return {number[][]}
*/
var insert = function (intervals, newInterval) {
if (intervals.length === 0) {
return [newInterval];
}
if (newInterval[1] < intervals[0][0]) {
return [newInterval, ...intervals];
}
if (intervals[intervals.length - 1][1] < newInterval[0]) {
return [...intervals, newInterval];
}
// 1. ๊ฒน์น๋ interval์ ์์, ๋ index๋ฅผ ๊ตฌํ๋ค.
let overLappingStartIndex = intervals.length - 1;
let overLappingEndIndex = 0;
for (let index = 0; index < intervals.length; index++) {
const interval = intervals[index];
if (newInterval[0] <= interval[1]) {
overLappingStartIndex = Math.min(overLappingStartIndex, index);
}
if (interval[0] <= newInterval[1]) {
overLappingEndIndex = Math.max(overLappingEndIndex, index);
}
}
// 2.
// ์์index ์ ๊น์ง ๋ชจ๋ ์ถ๊ฐํ๊ณ
// ์์index, ๋index์ ์ต๋ ๋ฒ์ interval์ ์ถ๊ฐํ๊ณ
// ๋index ์ดํ interval์ ๋ชจ๋ ์ถ๊ฐํ๋ค.
const result = [];
for (let index = 0; index < overLappingStartIndex; index++) {
result.push(intervals[index]);
}
const overLappedStart = Math.min(
intervals[overLappingStartIndex][0],
newInterval[0]
);
const overLappedEnd = Math.max(
intervals[overLappingEndIndex][1],
newInterval[1]
);
result.push([overLappedStart, overLappedEnd]);
for (let index = overLappingEndIndex + 1; index < intervals.length; index++) {
result.push(intervals[index]);
}
return result;
};