向上取整 ⌈ x ⌉ \lceil x \rceil ⌈x⌉
$\lceil x \rceil$
向下取整 ⌊ x ⌋ \lfloor x \rfloor ⌊x⌋
$\lfloor x \rfloor$
2023-12-06 17:32:16
向上取整 ⌈ x ⌉ \lceil x \rceil ⌈x⌉
$\lceil x \rceil$
向下取整 ⌊ x ⌋ \lfloor x \rfloor ⌊x⌋
$\lfloor x \rfloor$
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