LeetCode 16 3Sum Closest

题目

和上一题一样的思路

class Solution {
public:
    int threeSumClosest(vector<int>& nums, int target) {
        
        sort(nums.begin(),nums.end());
        int ans;
        int mm=999999;
        for(int i=0;i<nums.size();i++)
        {
            if(i!=0&&nums[i]==nums[i-1])
                continue;
            int start=i+1;
            int end=nums.size()-1;
            int x=nums[i];
            while(start<end)
            {
                if(nums[end]+nums[start]+x>target)
                {
                    if(mm>nums[end]+nums[start]+x-target)
                    {
                        mm=nums[end]+nums[start]+x-target;
                        ans=nums[end]+nums[start]+x;
                            
                    }
                    end--;
                    continue;
                }
                else if(nums[end]+nums[start]+x<target)
                {
                     if(mm>target-(nums[end]+nums[start]+x))
                    {
                        mm=target-(nums[end]+nums[start]+x);
                        ans=nums[end]+nums[start]+x;
                            
                    }
                    start++;
                    continue;
                }
                else
                {
                   return target;   
                }
            }
        }
        
        return ans;
    }
};