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

     int res = 0;
     int tmp = 0;
     int lastspace = 0;
     boolean flag = true;
     Arrays.sort(nums);
     for(int i = 0 ; i < nums.length ; i++){
         int j = i + 1;
         int z = nums.length -1;
         while(j < z){
             tmp = nums[i] + nums[j] + nums[z];
             if(Math.abs(tmp - target) < lastspace || (lastspace == 0 && flag)){
                lastspace = Math.abs(tmp - target);
                res = tmp;
                 if(tmp - target < 0){
                    j++;
                 }else{
                    z--;
                 }
                flag = false;

             }else{
                    if(lastspace +  target <= nums[i] + nums[j + 1] + nums[z]){
                        z--;
                    }else{
                        j++;
                    }
             }
         }
     }
     return res;
 }