Dsa
Hashing
Easy
Element Frequency
Given a list of integers, determine the frequency of each number and print the numbers that occur more than once in ascending order along with their frequencies.
Input format:
- The first line contains an integer n, the size of the array.
- The second line contains n integers.
Output format:
- Print each number that occurs more than once followed by its frequency.
Example:
Input:
7
1 2 3 1 2 1 4
Output:
1 3
2 2
Key concepts
hashingdictionariescounting
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