n = input('请输入一个正整数:')
count = 0
try:
for i in range(1, int(n)+1):
if i % 2 != 0:
count = count + (i * i)
print(1, count)
else:
count = count - (i * i)
print(2, count)
print('结果是:', count)
except BaseException:
print('您所输入的不是一个正整数')
如果有用望采纳