三角划分.cpp

1RIP路由协议 ——RIP协议最初是为Xerox网络系统的Xeroxparc通用协议而设计的

#include <stdio.h>

int a[21]={0,0,0,4,6,0,0,12,40,0,0,171,410,0,0,1896,5160,0,0,32757,59984};

int main()
{
	int n;

	while(1)
	{
		scanf("%d",&n);
		if(n==0)
			break;
		printf("%d\n",a[n]);
	}
	return 0;
}