Answer 1

#include <bits/stdc++.h> using namespace std; void findRepeat(int* a, int n){ //Declare the map unordered_map<int,int> hash; for(int i=0;i<n;i++){//creating the map hash[a[i]]++;//for same key increase frequency } cout<<"repeated number frequency\n"; //iterator->first == key(element value) //iterator->second == value(frequency) for(auto it=hash.begin();it!=hash.end();it++) if(it->second>1)//frequency>1 means repeating element printf("%d\t\t\t%d\n",it->first,it->second); } int main() { int n; cout<<"enter array length\n"; cin>>n; int* a=(int*)(malloc(sizeof(int)*n)); cout<<"input array elements...\n"; for(int i=0;i<n;i++) scanf("%d",&a[i]); //function to print repeating elements with their frequencies findRepeat(a,n); return 0; }
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