g hh

#include <iostream>

template <typename T>
void commonElem(T a[], T a2[], T a3[], int len, int len2, int len3) {
  std::cout<<"Common elements arrays is: ";
  for(int i{0}; i < len; ++i) {
    bool f2{false}, f3{false};
    for(int j{0}; j < len2; ++j) if(a[i] == a2[j]) f2 = true;
    for(int k{0}; k < len3; ++k) if(a[i] == a3[k]) f3 = true;
    if(f2 && f3) std::cout << a[i] << ' ';
  }
}

int main() {
int arr[]{23,12,54,2,7}, arr2[]{2,23,1,65}, arr3[]{43,2,76,4,23,8,96};
int l = std::size(arr), l2 = std::size(arr2), l3 = std::size(arr3);
commonElem(arr, arr2, arr3, l, l2, l3);
return 0;
}