https://www.acmicpc.net/problem/2442
import java.util.*;
fun main(args: Array<String>) {
val s=Scanner(System.`in`)
var n=s.nextInt()
for(i in 1..n){
for(k in 0 until n-i){
print(" ")
}
for(j in 0 until (i-1)*2+1){
print("*")
}
println()
}
}