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import java.util.Arrays;

/*******************************************************

* Copyright (C) 2018 KEEP.COM - All Rights Reserved

*

* @Date: 2018/11/12

* @Author: fangmingfu <fangmingfu@keep.com>

* ******************************************************/

public class code16 {

static class Solution {

public int threeSumClosest(int[] nums, int target) {

if(nums == null || nums.length < 3) return 0;

Arrays.sort(nums);

int res = Integer.MAX_VALUE;

for (int i = 0; i < nums.length - 2; i ++){

int start = i + 1;

int end = nums.length - 1;

while (start < end){

int sum = nums[i] + nums[start] + nums[end];

if ( Math.abs(target - sum) < Math.abs(res)){

res = target - sum;

}

if(sum > target){

end --;

}else{

start ++;

}

}

}

return target - res;

}

}

public static void main(String[] args) {

new Solution().threeSumClosest(new int[]{1,1,-1,-1,3}, -1);

}

}