# 370. Range Addition

Assume you have an array of length n initialized with all 0's and are given k update operations.

Each operation is represented as a triplet: \[startIndex, endIndex, inc] which increments each element of subarray A\[startIndex ... endIndex] (startIndex and endIndex inclusive) with inc.

Return the modified array after all k operations were executed.

Example:

Given:

```
length = 5,
updates = [
    [1,  3,  2],
    [2,  4,  3],
    [0,  2, -2]
]
```

Output:

```
[-2, 0, 3, 5, 3]
```

Explanation:

Initial state: \[ 0, 0, 0, 0, 0 ]

After applying operation \[1, 3, 2]: \[ 0, 2, 2, 2, 0 ]

After applying operation \[2, 4, 3]: \[ 0, 2, 5, 5, 3 ]

After applying operation \[0, 2, -2]: \[-2, 0, 3, 5, 3 ]

Credits:Special thanks to @vinod23 for adding this problem and creating all test cases.

## Solution <a href="#solution" id="solution"></a>

```java
public class Solution {
    public int[] getModifiedArray(int length, int[][] updates) {
        if (length <= 0) return new int[0];
        int[] result = new int[length];

        for(int i = 0; i < updates.length; i ++) {
            int[] current = updates[i];
            int startIndex = current[0];
            int endIndex = current[1];
            int addition = current[2];

            for(int j = startIndex; j <= endIndex; j ++) {
                result[j] += addition;
            }
        }

        return result;
    }
}
```


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://anand-aryan.gitbook.io/leetcode/370.-range-addition.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.