37 lines
992 B
C++
37 lines
992 B
C++
#include <bits/stdc++.h>
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using namespace std;
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class Solution {
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public:
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vector<vector<int>> fourSum(vector<int>& nums, int target) {
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set<vector<int>> resultSet;
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sort(nums.begin(), nums.end());
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for (int i = 0; i < nums.size(); i++) {
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for (int j = i + 1; j < nums.size(); j++) {
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int l = j + 1, r = nums.size() - 1;
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while (l < r) {
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long long sum = (long long)nums[i] + nums[j] + nums[l] + nums[r];
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if (sum < target) {
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l++;
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} else if (sum > target) {
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r--;
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} else {
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resultSet.insert({nums[i], nums[j], nums[l], nums[r]});
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l++;
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}
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}
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}
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}
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vector<vector<int>> result;
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for (auto& e : resultSet) {
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result.emplace_back(e);
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}
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return result;
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}
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};
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