URI Online Judge | 2655
# Dangerous Trail

**Timelimit: 1**

By Abner Samuel P. Palmeira, IFSULDEMINAS Brazil

Geraldo de Rívea is a witcher, and like every good witcher he prepares well, before facing a monster.

Geraldo wants to travel to Novigrad, for this he will have to cross a road that starts in the south and goes north straight, the big problem is that in every integer coordinate of that road there is a monster.

Since Geraldo does not like being caught unwarned he wants to know how many monster types exist from the X coordinates to the Y coordinate of that road.

To solve this problem Geraldo asked you to do a program that performs the following operations:

**1 L R **- Print how many different monsters there are from coordinate** L** to **R** on the road.

**2 C T** - The monster of coordinate **C** is now a monster of type **T**.

The first line contains three integers **N**, **Q** (1 ≤ **N**, **Q** ≤ 10^{5}) and **M** (1 ≤ **M** ≤ 50) representing the size of the road, the number of operations Geraldo wants to do, how many types of monsters Geraldo knows.

The second line will contain **N **integers x1, x2, ...., xn representing the type of monster that is initially in that position.

The next Q lines will contain Geraldo's queries, following the pattern described above.

Print query responses.

Input Sample | Output Sample |

5 6 5 1 2 1 4 5 1 1 5 1 1 3 2 3 3 1 1 3 1 1 2 1 1 1 |
4 2 3 2 1 |