Lintcode Medium Title: 3 Sum II three numbers and II

Topic

Three sum of the numbers II

to an array containing n integers, find and the ternary group closest to the given integer target, returning the number of the three numbers.

Sample Example

For example s = [-1, 2, 1,-4] and target = 1. And the ternary group closest to 1 is -1 + 2 + 1 = 2.

Note

You only need to return the sum of triples, without having to return the ternary group itself

Solving

Similar to the previous question, the program is only slightly modified

 Public classSolution {/**     * @paramnumbers:give An array numbers of n integer *@paramTarget:an Integer *@return: Return the sum of the three integers, the sum closest target. */     Public intThreesumclosest (int[] numbers,inttarget) {        //Write your code here        if(Numbers = =NULL)            return0;        Arrays.sort (numbers); intsum =Integer.max_value; intNumlen =numbers.length;  for(inti = 0;i< Numlen; i++){            intleft = i + 1; intright = Numlen-1;  while(Left <Right ) {                intTmpsum = Numbers[i] + numbers[left] +Numbers[right]; intTmpdist = Tmpsum-Target; Sum= Math.Abs (tmpdist) > Math.Abs (sum-target)?sum:tmpsum; if(Tmpdist = = 0){                    returnTarget; }                if(Tmpdist <0) { left++; }Else{ Right--; }            }        }        returnsum; }}

Java Code

Total time: 1504 Ms

classSolution:"""@param numbers:give An array numbers of n integer @param target:an integer @return: Return the sum of T    He three integers, the sum closest target. """    defthreesumclosest (self, Numbers, target):#Write your code here        ifNumbers = =None:return0 Numlen=len (Numbers) numbers.sort () sum=0 forIinchRange (numlen-1): Left= i + 1 Right= Numlen-1 whileLeft <Right:tmpsum= Numbers[i] + numbers[left] +Numbers[right] Tmpdist= Tmpsum-Targetifi==0:sum=tmpsum sum= SumifABS (Tmpdist) > abs (sum-target)ElseTmpsumifTmpdist = =0:returnTargetifTmpdist <0:left+=1Else: Right-=1returnSum

Python Code

Total time: 403 ms

Lintcode Medium Title: 3 Sum II three numbers and II