167. Two Sum II - Input Array Is Sorted

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.

Note:

• 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 <= nums.length <= 3 * 104`
• `-1000 <= nums[i] <= 1000`
• `nums` is sorted in increasing order.
• `-1000 <= target <= 1000`

167. Two Sum II - Input Array Is Sorted
``````struct Solution;

impl Solution {
fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
let mut left: usize = 0;
let mut right: usize = nums.len() - 1;
while left < right {
if nums[left] + nums[right] == target {
return vec![(left + 1) as i32, (right + 1) as i32];
}
if nums[left] + nums[right] < target {
left += 1;
continue;
}
if nums[left] + nums[right] > target {
right -= 1;
continue;
}
}
vec![0, 0]
}
}

#[test]
fn test() {
assert_eq!(Solution::two_sum(vec![2, 7, 11, 15], 9), vec![1, 2]);
}
``````