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solution.ts
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solution.ts
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// #Medium #Top_100_Liked_Questions #Top_Interview_Questions #Array #Sorting #Two_Pointers
// #Data_Structure_II_Day_1_Array #Algorithm_II_Day_3_Two_Pointers #Udemy_Two_Pointers
// #Big_O_Time_O(n*log(n))_Space_O(n^2) #2023_08_28_Time_148_ms_(92.62%)_Space_59.1_MB_(70.24%)
function threeSum(nums: number[]): number[][] { //NOSONAR
nums.sort((a, b) => a - b)
const len = nums.length
const result: number[][] = []
let l: number
let r: number
for (let i = 0; i < len - 2; i++) {
l = i + 1
r = len - 1
while (r > l) {
const sum = nums[i] + nums[l] + nums[r]
if (sum < 0) {
l++
} else if (sum > 0) {
r--
} else {
const list: number[] = [nums[i], nums[l], nums[r]]
result.push(list)
while (l < r && nums[l + 1] === nums[l]) {
l++
}
while (r > l && nums[r - 1] === nums[r]) {
r--
}
l++
r--
}
}
while (i < len - 1 && nums[i + 1] === nums[i]) {
i++ //NOSONAR
}
}
return result
}
export { threeSum }