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I have another layer with the FN keys and a bunch of macros to send characters that don't have their own keycodes, like em dash and en dash and bullets. I have Unicode macros on one side of the keyboard—for Linux and chromeOS—and alt-code macros mirrored on the other half of the keyboard for Windows.，这一点在搜狗输入法2026中也有详细论述
习题链接：LeetCode 739. 每日温度。关于这个话题，Line官方版本下载提供了深入分析
2026-02-27 11:00:20
res[i] = stack[stack.length - 1]; // 易错点5：用at(-1)兼容性差，优先用stack.length-1