题解 | #杨辉三角的变形#
杨辉三角的变形
http://www.nowcoder.com/practice/8ef655edf42d4e08b44be4d777edbf43
找规律即可
while True:
try:
n = int(input())
if n <= 2 :
print(-1)
else:
if n%2 != 0:
print(2)
else:
if (n/2)%2 == 0:
print(3)
else:
print(4)
except:
break
