Python

題目

There is a broken calculator that has the integer startValue on its display initially. In one operation, you can:

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The numeric value of a lowercase character is defined as its position (1-indexed) in the alphabet, so the numeric value of a is 1, the numeric value of b is 2, the numeric value of c is 3, and so on.

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You are given a string s. We want to partition the string into as many parts as possible so that each letter appears in at most one part.

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In a row of dominoes, tops[i] and bottoms[i] represent the top and bottom halves of the ith domino. (A domino is a tile with two numbers from 1 to 6 - one on each half of the tile.)

… Read More »LeetCode: 895-Maximum Frequency Stack 解題紀錄

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Given a string s, remove duplicate letters so that every letter appears once and only once. You must make sure your result is the smallest in lexicographical order among all possible results.

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Given a balanced parentheses string s, return the score of the string.

題目