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import java.util.Arrays;

/**

* Created by YGZ on 2016/2/23.

*/

public class ThreeSumClosest {

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

if (nums == null) return 0;

if (nums.length < 3) return 0;

Arrays.sort(nums);

int inter = Integer.MAX_VALUE;

int result = 0;

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

int l = i+1;

int r = nums.length-1;

while(l<r) {

int tem = nums[i] + nums[l] + nums[r];

if (tem < target) {

if (Math.abs(target - tem) < inter) {

inter = Math.abs(target - tem);

result = tem;

}

l++;

}else if (tem>target){

if (Math.abs(tem-target)<inter){

inter = Math.abs(tem-target);

result = tem;

}

r--;

}else{

return tem;

}

}

}

return result;

}

public static void main(String[] args){

int[] nums = {-1,2,1,-4};

ThreeSumClosest threeSumClosest = new ThreeSumClosest();

int result = threeSumClosest.threeSumClosest(nums,1);

System.out.println(result);

}

}