题解 | #圣诞树#

#include<stdio.h>
int main()
{
	int input;
	scanf("%d", &input);
	int kong1 = -1 + input * 3;
	int kong2 = -1 + input * 3;
	for (int i = 1; i <= input; i++)
	{
		int midkong = 4;
		for (int j = 1; j <= 3; j++)
		{
			for (int k = 1; k <= kong1; k++)
				printf(" ");
			kong1--;
			for (int d = 1; d <= i; d++)
			{

				for (int a = 1; a <= j; a++)
					printf("* ");
				for (int e = midkong; e >= 1; e--)
					printf(" ");
			}
			midkong -= 2;
			printf("\n");
		}
	}
	for (int b = 1; b <= input; b++)
	{
		for (int c = 1; c <= kong2; c++)
			printf(" ");
		printf("*\n");
	}
	return 0;
}