// you can also use imports, for example:
// import java.util.*;

// you can write to stdout for debugging purposes, e.g.
// System.out.println("this is a debug message");

class Solution {
    public int solution(int[] A) {
        // write your code in Java SE 8
    }
}

// you can write to stdout for debugging purposes, e.g.
// print "this is a debug message\n";

function solution($A) {
    // write your code in PHP7.0
}

// you can write to stdout for debugging purposes, e.g.
// print "this is a debug message\n";

function solution($A) {
    $unique = array_unique($A);
    return count($A);
}

// you can write to stdout for debugging purposes, e.g.
// print "this is a debug message\n";

function solution($A) {
    $unique = array_unique($A);
    var_dump($unique);
    return count($A);
}

// you can write to stdout for debugging purposes, e.g.
// print "this is a debug message\n";

function solution($A) {
    $unique = array_unique($A);
    $aligned = array_value($unique);
    return count($A);
}

// you can write to stdout for debugging purposes, e.g.
// print "this is a debug message\n";

function solution($A) {
    $unique = array_unique($A);
    $aligned = array_value($unique);
    return count($aligned);
}

// you can write to stdout for debugging purposes, e.g.
// print "this is a debug message\n";

function solution($A) {
    $unique = array_unique($A);
    $aligned = array_values($unique);
    return count($aligned);
}

// you can write to stdout for debugging purposes, e.g.
// print "this is a debug message\n";

function solution($A) {
    $unique = array_unique($A);
    $aligned = array_values($unique);
    return count($aligned);
}

// you can write to stdout for debugging purposes, e.g.
// print "this is a debug message\n";

function solution($A) {
    $unique = array_unique($A);
    $aligned = array_values($unique);
    return count($aligned);
}