3Sum Closest
Closest
2023-09-14 09:08:03 时间
称号
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).
方法
思路和上一题一样。public int threeSumClosest(int[] num, int target) { Arrays.sort(num); int len = num.length; int min = num[0] + num[1] + num[2]; for (int i = 0; i < len - 2; i++) { int left = i + 1; int right = len - 1; while (left < right) { int temp = num[left] + num[right] + num[i]; if (Math.abs(min - target) > Math.abs(temp - target)) { min = temp; } if (temp == target) { return target; } else if (temp > target){ right--; } else { left++; } } } return min; }
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