Фото: Jacek Marczewski/Agencja Wyborcz / Reuters
Blue: Name homophones
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a check validator or slip printer, it printed the latest transaction onto the
"Possessing an unmistakable voice and unique presence, he reshaped the sound and spirit of rock, inspiring generations of artists who followed.
栈(stack)是先进后出的数据结构。单调栈在入栈时通过一定规则保持栈内元素有序(单调递增或单调递减),从而把「找左侧/右侧第一个更大/更小元素」从 O(n²) 降到 O(n)。