помогите решить задачку в с++

#include
#include
#include
#include
#include

using namespace std;

int main() {
srand(time(nullptr));
int n;
cout << "array size? ";
cin >> n;
int *a = new int[n];
generate_n(a, n, []() { return rand() % 100; });
cout << "array: ";
copy(a, a + n, ostream_iterator(cout, " "));
cout << endl;
for_each(a, a + n, [](int &e) { if (e % 3 == 2) e *= e; });
cout << "\nresult: ";
copy(a, a + n, ostream_iterator(cout, " "));
cout << '\n';
delete[] a;
}