doesntMatter

package main

import (
    "fmt"
)


func main() {
    var n,tmp int
    count := 0
    fmt.Scanf("%d", &n)
    aux := make([]int, n+1)

    for i := 0; i < n; i++ {
        fmt.Scanf("%d", &tmp)
        if aux[tmp] == 0 {
            count++
            aux[tmp] = 1
        }
    }

}