**Time limit:**1.00 s**Memory limit:**512 MB

What is the maximum amount of money you can earn?

**Input**

The first input line contains an integer $n$: the number of projects.

After this, there are $n$ lines. Each such line has three integers $a_i$, $b_i$, and $p_i$: the starting day, the ending day, and the reward.

**Output**

Print one integer: the maximum amount of money you can earn.

**Constraints**

- $1 \le n \le 2 \cdot 10^5$

- $1 \le a_i \le b_i \le 10^9$

- $1 \le p_i \le 10^9$

**Example**

Input:

`4`

2 4 4

3 6 6

6 8 2

5 7 3

Output:

`7`