杨辉三角的变形

1、先找规律：
-1 -1 (2 3 2 4) (2 3 2 4) (2 3 2 4) 循环
2、

def demo(temp):
    arr = [4, 2, 3, 2]
    if temp <= 2:
        return -1
    return arr[(temp-2)%4]

import sys

for line in sys.stdin:
    a = line.split()
    for i in a:
        print(demo(int(i)))