import java.util.Scanner;
public class demo4 {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.println("请输入等腰三角形的行数：");
int hangshu = scanner.nextInt();
for (int i=1; i<=hangshu; i++){
for (int j=0; j<hangshu-i; j++){
System.out.print(" ");
}
for ( int j=0; j<2*i-1; j++){
System.out.print("*");
}
System.out.println();
}
}
}
// √
