leetcode-java-167. Two Sum II - Input array is sorted
2016-09-04 12:46
555 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. Input: numbers={2, 7, 11, 15}, target=9 Output: index1=1, index2=2 */ /* 1.如果用两个for循环,复杂度是o(n^2) 2.一般这种排序的数组求和,两个指针,一前一后遍历一遍,复杂度是o(n^2) */ public class Solution { public int[] twoSum(int[] numbers, int target) { int len = numbers.length, left = 0, right = len - 1; int[] array = new int[2]; if(len < 2) { return array; } while(left < right) { int total = numbers[left] + numbers[right]; if(total == target) { array[0] = left + 1; array[1] = right + 1; return array; } else if(total > target) { right--; } else { left++; } } return array; } }
相关文章推荐
- LeetCode - 167. Two Sum II - Input array is sorted - O(n) - ( C++ ) - 解题报告
- 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 解题报告
- Leetcode 167. Two Sum II - Input array is sorted (Medium) (cpp)
- LeetCode 167. Two Sum II - Input array is sorted
- LeetCode 167. Two Sum II - Input array is sorted(两数和)
- 【LeetCode】167. Two Sum II - Input array is sorted
- [leetcode 刷题记录] 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
- Java [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
- leetcode167. Two Sum II - Input array is sorted
- LeetCode 167. Two Sum II - Input array is sorted 题解(C++)
- 【leetcode】167. Two Sum II - Input array is sorted
- LeetCode 167. Two Sum II - Input array is sorted