K Unique Characters

Juni 07, 2021 Posting Komentar

Press the Alt key and hold it down. Ensure that the Num Lock key has been pressed to activate the numeric key section of the keyboard.

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A number representing length of the longest K unique characters substring.

K unique characters. Release the Alt key and the character will appear. For the string aabacbebebe with k 3 we would expect the answer to be cbebebe. Valid substring is defined as a substring that has exactly K unique characters.

The longest substring is aaa as a is repeated 3 times. Initialize a HashMap that stores the character count for each character in the current window. In this problem we have to find the length of the longest substring with at most K unique characters.

3 Possible substrings are a a aa. To solve this problem we will use a Hahmap of Character vs Integer which will store the frequency of characters. 2 Possible substrings are ab bc Input.

You are given a string str and a number K. If there is no possible substring then print -1. This is the longest with length 7 and it has unique characters c b and e.

Possible substrings of length K 2 are ab. Aabbcc k 3 There are substrings with exactly 3 unique characters aabbcc abbcc aabbc abbc Max is aabbcc with length 6. For example consider string abcbdbdbbdcdabd.

Update the result if all the characters in the window have at least k frequency. Iterate over the string and insert new characters in the HashMap until we have exactly K distinct characters in the HashMap. Emoji Hearts Currencies Arrows Stars and many others Copied.

The problem differs from the problem of finding the longest subsequence with k distinct characters. 2 distinct characters bab. To solve this we will follow these.

At this point we have a window subarray that conforms to our criteria of having exactly K unique characters. You have to find the count of valid substrings of the given string. That contains k unique characters where k will be the first character.

Now iterate over the array and check if. Str aabab K 3 Output. So remember the length of this window as the longest window so far.

Suppose we have a string we have to return the longest possible substring that has exactly k number of unique characters if there are more than one substring of longest possible length return any of them. You have to find length of the longest substring that has exactly k unique characters. While the Alt key is pressed type the sequence of numbers on the numeric keypad from the Alt code in the above table.

S aabacbebebe K 3 Output. The time complexity of this solution is On 3 since it takes On 2 time to generate all substrings for a string of length n and On time to process each substring. Sort the characters acc to the frequency and pick top K characters.

1. Unlike subsequences substrings are required to occupy consecutive positions within the original string. S ababbc k 2 Output.

2 distinct characters bc. We can improve the time complexity using extra space. Given a string you need to print the size of the longest possible substring that has exactly K unique characters.

S consists of only lowercase English letters. This solution would scale for K unique characters. Aa k 1 Output.

Aaabbb k 3 There are only two unique characters thus show error message. Find copy and paste your favorite characters. We will understand this problem for the input string str aabcbcdbca and k2.

Given a string of lowercase alphabets count all possible substrings not necessarily distinct that has exactly k distinct characters. We iterate over the string of length. Cbebebe is the longest substring with K distinct characters.

The longest substring is ababb as a is repeated 2 times and b is repeated 3 times. ž Classic Currency. S aaaa K 2 Output.

S aabacbebebe K 3 Output. To type a special character using an Alt keyboard sequence. 1 distinct character Only two valid substrings exist ab bc.

We would like to show you a description here but the site wont allow us. 1. If there is no possible substring then print -1.

Cbebebe is the longest substring with K distinct characters. Input Format A string Output Format A number representing count of substrings with exactly K unique characters. If no such substring exists print -1.

You have to find the length of the longest substring that has exactly k unique characters. Aba k 2 Output. S aaabb k 3 Output.

Abc k 2 Output. Emojis Graphic shapes. My first assumption is that we arent reordering the string and we arent dealing with weird characters or considering upperlowercase.

To check that the length given by binary search will have k unique characters a set can be used to insert all the characters and then if the size of the set is less than k then the answer is not possible else the answer given by the binary search is the max answer. First pointer will acquire the characters one by one until the substring contains at. In the string because the first character will be the integer k.

If no such substring exists print -1. A simple solution would be to generate all substrings of the given string and return substrings containing exactly k distinct characters. 2 distinct characters aba.

All characters Alphabetical order. And we will use a two pointers approach. 2 distinct characters cc.

Possible substrings of length K 3 are aab. S aaaa K 2 Output. The substring will start from the second position.

You are given a string str and a number K. Given a string you need to print the size of the longest possible substring that has exactly K unique characters. Mathcal O text maxUnique cdot N OmaxUniqueN.

Keep track of the number of unique characters in the current sliding window having at least k frequency given by countAtLeastK. If str is 2aabbacbaa there are several substrings. 3 Possible substrings are ab ba aba Input.

So if the input is like s ppqprqtqtqt k 3 then the output will be rqtqtqt as that has length 7. You are given a stringstr and a number K.

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