Category: c / c++

Two strings are isomorphic if the characters in one string can be replaced to get another one. No two characters may map to the same character. A character can …

Given a string that contains characters of ASCII no more than 256, sort it in non-ascending order based on the frequency of the characters. For example, Input “tree” the …

Given a string S and a character C, return an array of integers representing the shortest distance from the character C in the string. Example: Input: S = “loveleetcode”, …

Given two non-negative integers represented by strings, return the sum of both. You should not use any BigInteger library nor convert the inputs to integer types directly, as the …

An array is called monotonic if it is either monotone increasing or monotone decreasing. An array A is monotone increasing if for all i <= j, A <= A. …