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  1. Prepare
  2. Data Structures
  3. Arrays
  4. Array Manipulation

Array Manipulation

Starting with a 1-indexed array of zeros and a list of operations, for each operation add a value to each the array element between two given indices, inclusive. Once all operations have been performed, return the maximum value in the array.

Example

Queries are interpreted as follows: 

    a b k
    1 5 3
    4 8 7
    6 9 1

Add the values of between the indices and inclusive:

index->	 1 2 3  4  5 6 7 8 9 10
	[0,0,0, 0, 0,0,0,0,0, 0]
	[3,3,3, 3, 3,0,0,0,0, 0]
	[3,3,3,10,10,7,7,7,0, 0]
	[3,3,3,10,10,8,8,8,1, 0]

The largest value is after all operations are performed.

Function Description

Complete the function arrayManipulation in the editor below.

arrayManipulation has the following parameters:

  • int n - the number of elements in the array
  • int queries[q][3] - a two dimensional array of queries where each queries[i] contains three integers, a, b, and k.

Returns

  • int - the maximum value in the resultant array

Input Format

The first line contains two space-separated integers and , the size of the array and the number of operations.
Each of the next lines contains three space-separated integers , and , the left index, right index and summand.

Constraints

Sample Input

5 3
1 2 100
2 5 100
3 4 100

Sample Output

200

Explanation

After the first update the list is 100 100 0 0 0.
After the second update list is 100 200 100 100 100.
After the third update list is 100 200 200 200 100.

The maximum value is .