题解 | #杨辉三角的变形#
杨辉三角的变形
https://www.nowcoder.com/practice/8ef655edf42d4e08b44be4d777edbf43
guilv = [2,3,2,4]
n = int(input())
if n == 1 or n == 2:
print(-1)
elif (n-3)%4 == 0 or (n-5)%4 == 0:
print(2)
elif (n-4)%4 == 0:
print(3)
else:
print(4)
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