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Given an array of integers numbers
that is already sorted in ascending order, find two numbers such that they add up to a specific target
number.
Return the indices of the two numbers (1-indexed) as an integer array answer
of size 2
, where 1 <= answer[0] < answer[1] <= numbers.length
.
You may assume that each input would have exactly one solution and you may not use the same element twice.
Example 1:
Input: numbers = [2,7,11,15], target = 9
Output: [1,2]
Explanation: The sum of 2 and 7 is 9. Therefore index1 = 1, index2 = 2.
Example 2:
Input: numbers = [2,3,4], target = 6
Output: [1,3]
Example 3:
Input: numbers = [-1,0], target = -1
Output: [1,2]
Constraints:
2 <= numbers.length <= 3 * 104
-1000 <= numbers[i] <= 1000
numbers
is sorted in increasing order.
-1000 <= target <= 1000
- Only one valid answer exists.
[Array]
[Two Pointers]
[Binary Search]
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