[LeetCode]167 Two Sum II - Input array is sorted
2017-02-08 11:43
369 查看
Given an array of integers that is already sorted in ascending order, find two numbers such that they add up to a specific target number.
The function twoSum should return indices of the two numbers such that they add up to the target, where index1 must be less than index2. Please note that your returned answers (both index1 and index2) are not zero-based.
You may assume that each input would have exactly one solution and you may not use the same element twice.
Input: numbers={2, 7, 11, 15}, target=9
Output: index1=1, index2=2
Share
my java AC solution.
Without HashMap, just have two pointers, A points to index 0, B points to index len - 1, shrink the scope based on the value and target comparison.
The function twoSum should return indices of the two numbers such that they add up to the target, where index1 must be less than index2. Please note that your returned answers (both index1 and index2) are not zero-based.
You may assume that each input would have exactly one solution and you may not use the same element twice.
Input: numbers={2, 7, 11, 15}, target=9
Output: index1=1, index2=2
Share
my java AC solution.
Without HashMap, just have two pointers, A points to index 0, B points to index len - 1, shrink the scope based on the value and target comparison.
public int[] twoSum(int[] num, int target) { int[] indice = new int[2]; if (num == null || num.length < 2) return indice; int left = 0, right = num.length - 1; while (left < right) { int v = num[left] + num[right]; if (v == target) { indice[0] = left + 1; indice[1] = right + 1; break; } else if (v > target) { right --; } else { left ++; } } return indice; }
相关文章推荐
- Leetcode 167 Two Sum II - Input array is sorted
- Leetcode #167 Two Sum II - Input array is sorted
- LeetCode[167]Two Sum II - Input array is sorted
- LeetCode 167 Two Sum II - Input array is sorted
- LeetCode 167:Two Sum II - Input array is sorted
- Leetcode #167 Two Sum II - Input array is sorted
- [leetcode 167] Two Sum II - Input array is sorted
- LeetCode 167 Two Sum II - Input array is sorted
- leetcode_167 Two Sum II - Input array is sorted
- leetcode167: Two Sum II - Input array is sorted
- leetcode 167: Two Sum II - Input array is sorted
- leetcode[167] Two Sum II - Input array is sorted
- LeetCode 167 Two Sum II - Input array is sorted (两点法)
- 【python】【leetcode】【算法题目167—Two Sum II - Input array is sorted】
- Java [Leetcode 167]Two Sum II - Input array is sorted
- Leetcode 167 Two Sum II - Input array is sorted
- LeetCode 167 TwoSumII-InputArrayIsSorted
- leetcode 167 Two Sum II - Input array is sorted C++
- LeetCode[167] Two Sum II - Input array is sorted
- LeetCode 167: Two Sum II - Input array is sorted