Suppose we have one array. we have to count how many of the elements present in the array prime number of times. So if the array is {1, 2, 2, 0, 1, 5, 2, 5, 0, 0, 1, 1}, then 1 is present 4 times, 2 is present 3 times, 0 is present 3 times, and 5 is present 2 times. So there are three elements {2, 0, 5} that have occurred prime number of times. So the count will be 3.
Algorithm
countPrimeOccurrence(arr, n)
Begin count := 0 define map with int type key and int type value for each element e in arr, do increase map.key(arr).value done for each key check whether the value corresponding the value is prime or not, if prime, then increase count. return countEnd
Example
#include #include
输出
Prime frequency count: 3
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