题解 | #杨辉三角的变形#
杨辉三角的变形
http://www.nowcoder.com/practice/8ef655edf42d4e08b44be4d777edbf43
while True: #大佬计算的一个规律
try:
x = int(input())
if x < 3:
print(-1)
elif x%4==1 or x%4==3:
print(2)
elif x%4==2:
print(4)
elif x%4==0:
print(3)
except:
break
try:
x = int(input())
if x < 3:
print(-1)
elif x%4==1 or x%4==3:
print(2)
elif x%4==2:
print(4)
elif x%4==0:
print(3)
except:
break
