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LeetCode016_3Sum_Closest.cpp
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60 lines (45 loc) · 1.37 KB
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class Solution {
public:
int threeSumClosest(vector<int>& nums, int target) {
int pos = 0;
int closeset_sum = 65535;
int result = 0;
sort(nums.begin(), nums.end());
if(nums.size() < 3)
{
return result;
}
for(int i = 0; i < nums.size()-2; i++)
{
if (i > 0 && nums[i] == nums[i - 1])
{
continue;
}
int start = i+1;
int end = nums.size()-1;
while(start < end)
{
if(start > i+1 && nums[start] == nums[start-1])
{
start++;
continue;
}
int sum = nums[i] + nums[start] + nums[end];
if(sum - target > 0)
{
end--;
}
else if(sum - target <= 0)
{
start++;
}
if(closeset_sum > abs(sum - target))
{
closeset_sum = abs(sum - target);
result = sum;
}
}
}
return result;
}
};