题解 | #杨辉三角的变形#
杨辉三角的变形
https://www.nowcoder.com/practice/8ef655edf42d4e08b44be4d777edbf43
n = int(input())
src = [2,3,2,4]
res = 0
if n<3:
res = -1
elif (n-3)%4 ==0:
res = src[0]
elif (n-3)%4==1:
res = src[1]
elif (n-3)%4==2:
res = src[2]
elif (n-3)%4==3:
res = src[3]
print(res)
