Given an array of n integers nums and a target, find the number of index triplets i, j, k
with 0 <= i < j < k < n
that satisfy the condition nums[i] + nums[j] + nums[k] < target
.
For example, given nums = [-2, 0, 1, 3]
, and target = 2.
Return 2. Because there are two triplets which sums are less than 2:
[-2, 0, 1] [-2, 0, 3]
Follow up:
Could you solve it in O(n^2) runtime?
import java.util.Arrays;
/**
* @Author you guess
* @Date 2020/12/15 21:46
* @Version 1.0
* @Desc
*/
public class LeetCode_259_3SumSmaller {
public int threeSumSmal