There is a bag of balls with different types of colours. You have to find out the Total number of different types of colors of ball present in the bags. Bag of balls will be represented as an array $\text{'}$A$\text{'}$ containing integers $\text{'}$Ai$\text{'}.$ Different values of Ai represents different colors. Example $1$: There is a bag containing the following balls : $1,2,1,1,3,3,5.$ Now the types of colors present in the bags are $1,2,3,5$ so the number of Types of colours are $4$ so answer is $4.$ Example $2$: There is a bag containing the following balls : $2,9,2,9,5,5,5.$ Now the types of colors present in the bags are $2,9,5$ so the number of Types of colours are $3$ so answer is $3.$

Input Format

The first line will contain an integer n which is the length of array $\text{'}$A$\text{'}.$ The second line will contain n space seperated integers representing the elements of array $\text{'}$A$\text{'}$

Constraints

$0<$ n $<=100000,0<$ Ai $<10$

Output Format

Print a single line containing the integer representing the numbers of colors of balls present in the bag.

Sample Input $0$

$5$

$15454$

Sample Output $0$

$3$

Explanation $0$

The different types of colors present in the array are $1,5,4$ so there are only $3$ types of colors.