AcWing 828. 模拟栈-白红宇

AcWing 828. 模拟栈

阅读量：348 次

发布时间：2019-03-04

本文共 471 字，大约阅读时间需要 1 分钟。

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???????????????????1000000??????100000????

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static int tt = 0???????????????0?

static int[] st = new int[N];?????????????

push???

????x????????st[tt] = x???tt++?

pop???

??tt > 0?????????????tt--??????????

empty???

??tt > 0????????????NO??????YES?

query???

???????????????st[tt]?????-1?

???????

??M????????????

??empty?query????????????????????

??????

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