代码截图和程序运行结果

student_num = input()
N = int(student_num[-5:])
s = 0
for i in range(1, N + 1):
    s += i * (-1) ** (i - 1)
print(s)

x = input()

x = int(x) % 100000

if (x % 2) == 0:
    print( int( -x/2 ) )
else:
    print( int( ( x + 1 ) / 2) )