Solution Class Reference

Public Member Functions
vector< vector< int > >	threeSum (vector< int > &nums)

Detailed Description

Definition at line 9 of file main.cpp.

Member Function Documentation

threeSum()

vector< vector< int > > Solution::threeSum ( vector< int > &  nums )

inline

Definition at line 12 of file main.cpp.

    {
        vector<vector<int>> result;
        sort(nums.begin(), nums.end());
        int length = nums.size();
        for (int i = 0; i < length; ++i)
        {
            // skip duplicates
            if (i > 0 && nums[i] == nums[i - 1])
                continue;
 
            int target = -nums[i]; // fixing ith element as target for two sum
            int left = i + 1;
            int right = length - 1;
 
            while (left < right)
            {
                int sum = nums[left] + nums[right];
                if (sum == target)
                {
                    result.push_back({nums[i], nums[left], nums[right]});
 
                    // skip duplicates for left pointer
                    while (left < right && nums[left] == nums[left + 1])
                        ++left;
 
                    // skip duplicates for right pointer
                    while (left < right && nums[right] == nums[right - 1])
                        --right;
 
                    ++left;
                    --right;
                }
                else if (sum < target)
                    ++left;
                else // sum >= target
                    --right;
            }
        }
        return result;
    }

Referenced by main().

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The documentation for this class was generated from the following file:

• main.cpp