Let’s define a function countUniqueChars(s) that returns the number of unique characters on s, for example if s = "LEETCODE" then "L", "T","C","O","D" are the unique characters since they appear only once in s, therefore countUniqueChars(s) = 5.On this pro...
https://github.com/grandyang/leetcode/issues/1248 类似题目: Number of Substrings Containing All Three Characters Replace the Substring for Balanced String Max Consecutive Ones III Binary Subarrays With Sum Subarrays with K Different Integers Fruit Into Baskets Shortest Subarray with Sum at Least K ...
Let's define a function `countUniqueChars(s)` that returns the number of unique characters on `s`, for example if `s = "LEETCODE"` then `"L"`, `"T"`,`"C"`,`"O"`,`"D"` are the unique characters since they appear only once in `s`, therefore `countUniqueChars(s) = 5`....
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Explanation: The special characters are'a','b', and'c'. Example 2: Input:word = "abc" Output:0 Explanation: There are no special characters inword. Example 3: Input:word = "AbBCab" Output:0 Explanation: There are no special characters inword. ...
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