func test():
print(-9223372036854775808 == (1 << 63))
print(-2)
print(- 2)
print(---2)
print(3 - 2)
print(3-2)
print(3---2)
print(-3 - 2)
print(-3 - -2)
print(-(3 - 2)-2)
print([1, 2, 3][0]-1)
var t = 1
print(t-1)
print(-0xFF)
print(1--0xFF)
print(floor(PI-1))