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Given an array S of n integers, find three integers in S such that the sum is closest to a given number, target. Return the sum of the three integers. You may assume that each input would have exactly one solution.
For example, given array S = {-1 2 1 -4}, and target = 1.
The sum that is closest to the target is 2. (-1 + 2 + 1 = 2).
和3 sum几乎一样，用一个variable来record target - sum的绝对值，一直变动。但要注意的是：一旦遇到sum == target的，要break!
18行：if(sum==target)
ReplyDeletereturn target;