## Array Manipulation

You are given a list(1-indexed) of size , initialized with zeroes. You have to perform operations on the list and output the maximum of final values of all the elements in the list. For every operation, you are given three integers , and and you have to add value to all the elements ranging from index to (both inclusive).

For example, consider a list of size . The initial list would be = [, , ] and after performing the update = , the new list would be = [, , ]. Here, we've added value 30 to elements between indices 2 and 3. Note the index of the list starts from 1.

**Input Format**

The first line will contain two integers and separated by a single space.

Next lines will contain three integers , and separated by a single space.

Numbers in list are numbered from to .

**Constraints**

**Output Format**

Print in a single line the maximum value in the updated list.

**Sample Input**

```
5 3
1 2 100
2 5 100
3 4 100
```

**Sample Output**

```
200
```

**Explanation**

After first update list will be `100 100 0 0 0`

.

After second update list will be `100 200 100 100 100`

.

After third update list will be `100 200 200 200 100`

.

So the required answer will be 200.