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25 lines (24 loc) · 709 Bytes
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15. 3Sum.js
File metadata and controls
25 lines (24 loc) · 709 Bytes
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var threeSum = function (nums) {
let result = new Array();
nums.sort((a, b) => a - b);
for (let i = 0; i < nums.length - 2; ++i) {
let left = i + 1;
let right = nums.length - 1;
while (left < right) {
let sum = nums[left] + nums[right];
if (sum === -nums[i]) {
result.push([nums[i], nums[left], nums[right]]);
left++;
right--;
while (left < right && nums[left] === nums[left - 1]) left++;
while (left < right && nums[right] === nums[right + 1]) right--;
} else if (sum < -nums[i]) {
left++;
} else {
right--;
}
}
while (i < nums.length - 2 && nums[i] == nums[i + 1]) ++i;
}
return result;
};