Maximum occurrence of a number in a given array

Question: Given an array of n numbers. Give an algorithm for finding the element which appears maximum number of times in the array? Input: 3, 2, 1, 2, 2, 3 Output: 2. One simple and a brute force solution to this is, for each input element check whether there is any element with same value and for each occurrence, increment the counter.

Each time, check the current counter with the max counter and update it if this value is greater than max counter. This we can solve just by using two simple for loops. Click here for an even optimized approach. I was born with the love for exploring and want to do my best to give back to the community. I also love taking photos with my phone and Canon Kiss X-5 in order to capture moments in my life.

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Find the element which appears maximum number of times in an array?

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Home Arrays Find the element which appears maximum number of times in an array? Find the element which appears maximum number of times in an array? Input: 3, 2, 1, 2, 2, 3 Output: 2 One simple and a brute force solution to this is, for each input element check whether there is any element with same value and for each occurrence, increment the counter.

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Write a program to check if there are any duplicated elements in an array? Method 3. Method 2. You may also like. Container with maximum water April 6, Unordered Linear Search January 25, An array puzzle March 30, Sorry, your blog cannot share posts by email.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information.

I'm having issues in a basic program about the maximum value of an array and its number of occurrences. I don't get how the program is getting compiled. I've tested it on paper and compiled in Visual Studioif I give at most ten values it works fine, but if I exceed ten numbers in the array, the count is acting crazy.

Maximum Occurrence in a Given Range

In the second for loop you check if the current item in the array is bigger than the current biggest; if it's true you make the new maximum the current item and set the count to 0 - you should actually set it to 1.

If it isn't bigger you increment the count - that's another problem. If the current number is less than the maximum and not equal to it you shouldn't incement the count variable, but that's what your code does.

First, you should check that n is less than You should also add braces around single statements to avoid bugs. You also have an issue as count should be set to 1not 0and you should only increase it if you encounter the same number. Learn more. Maximum value and the number of occurrences in an array Ask Question. Asked 1 year, 11 months ago.

Active 1 year, 11 months ago. Viewed times. Here is the code. Biffen 5, 5 5 gold badges 27 27 silver badges 31 31 bronze badges. Angel Angel 35 2 2 bronze badges. Did that, thank you for the hint, but still won't output the correct result.Given an array of n integers in non-decreasing order. Find the number of occurrences of the most frequent value within a given range. Segment Trees can be used to solve this problem efficiently. Refer here for the implementation of segment trees The key idea behind this problem is that the given array is in non-decreasing order which means that all occurrences of a number are consecutively placed in the array as the array is in sorted order.

A segment tree can be constructed where each node would store the maximum count of its respective range [i, j]. For e. Now there are two cases to be considered, Case 1: The value of the numbers at index i and j for the given range are same, i. Solving this case is very easy. Hence answer for this case is simply count of all numbers between i and j inclusive both i.

Case 2: The value of the numbers at index i and j for the given range are different, i. This may be a case of partial overlap where some occurrences of a particular number lie in the leftmost part of the given range and some lie just before range starts. Here simply calling RMQ would result into an incorrect answer. Similar situation can happen at the rightmost part of the given range where some occurences of a particular number lies inside the range and some lies just after the range ends.

Hence for this case, inside the given range we have to count the leftmost same numbers upto some index say i and rightmost same numbers from index say j to the end of the range. Further Optimization: For the partial overlapping case we have to run a loop to calculate the count of same numbers on both sides.

To avoid this loop and perform this operation in O 1we can store the index of the first occurrence of every number in the given array and hence by doing some precomputation we can find the required count in O 1. Time Complexity: Time Complexity for tree construction is O n. Time complexity to query is O Log n. This article is attributed to GeeksforGeeks. Query 2: '7' occurred the most number of times with a frequency of 3 within given range. Correct answer is 3. Hence maximum would be 2.

The following. Initially 0 is passed as root is. It mainly uses RMQUtil. This function allocates memory for segment.Given a string consisting of lower case English Alphabets. The task is to count the number of occurrences of the non-empty prefix which occurs the maximum number of times in the string as a substring.

Also the 1st character of a string is the minimum length prefix. So, the prefix with maximum number of occurrences will be the first character of the string itself. Therefore, the task now reduces to find the frequency of the first character in the given string. Attention reader! If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute. See your article appearing on the GeeksforGeeks main page and help other Geeks. Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.

Writing code in comment?

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Please use ide. Python3 program to find the number. Find the frequency of first. WriteLine prefixOccurrences str. Recommended Posts: Count maximum occurrence of subsequence in string such that indices in subsequence is in A. Count all elements in the array which appears at least K times after their first occurrence Find the occurrence of the given binary pattern in the binary representation of the array elements Sort an array in descending order based on the sum of its occurrence Modify given array by incrementing first occurrence of every element by K Construct an Array of Strings having Longest Common Prefix specified by the given Array Maximum length prefix of one string that occurs as subsequence in another Find the maximum length of the prefix Maximum length prefix such that frequency of each character is atmost number of characters with minimum frequency Program to count occurrence of a given character in a string Generate two output strings depending upon occurrence of character in input string.

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Check out this Author's contributed articles. Improved By : andrewmohit kumar 29AnkitRai Load Comments. We use cookies to ensure you have the best browsing experience on our website.Given an array of n integers in non-decreasing order. Find the number of occurrences of the most frequent value within a given range. Segment Trees can be used to solve this problem efficiently. Refer here for the implementation of segment trees The key idea behind this problem is that the given array is in non-decreasing order which means that all occurrences of a number are consecutively placed in the array as the array is in sorted order.

A segment tree can be constructed where each node would store the maximum count of its respective range [i, j]. For e. Now there are two cases to be considered, Case 1: The value of the numbers at index i and j for the given range are same, i. Solving this case is very easy. Hence answer for this case is simply count of all numbers between i and j inclusive both i.

Case 2: The value of the numbers at index i and j for the given range are different, i. This may be a case of partial overlap where some occurrences of a particular number lie in the leftmost part of the given range and some lie just before range starts.

maximum occurrence of a number in a given array

Here simply calling RMQ would result into an incorrect answer. Similar situation can happen at the rightmost part of the given range where some occurrences of a particular number lies inside the range and some lies just after the range ends. Hence for this case, inside the given range we have to count the leftmost same numbers upto some index say i and rightmost same numbers from index say j to the end of the range.

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Further Optimization: For the partial overlapping case we have to run a loop to calculate the count of same numbers on both sides. To avoid this loop and perform this operation in O 1we can store the index of the first occurrence of every number in the given array and hence by doing some precomputation we can find the required count in O 1.

Time Complexity: Time Complexity for tree construction is O n. Time complexity to query is O Log n. Attention reader! If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute. See your article appearing on the GeeksforGeeks main page and help other Geeks. Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.

Writing code in comment? Please use ide. Red-Black Tree Set 2 Insert. Query 2: '7' occurred the most number of times with a frequency of 3 within given range. The following. Initially 0 is passed as root is. It mainly uses RMQUtil. This function allocates memory for segment. Nishant Tanwar.

maximum occurrence of a number in a given array

Check out this Author's contributed articles. Load Comments. We use cookies to ensure you have the best browsing experience on our website.Among all the different types of marketing inserts, like thank you cards, discounts, and cross-sells, we are interested in asking for a product review.

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Maximum occurrence of prefix in the Array

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maximum occurrence of a number in a given array

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