// Author : Khadiza Sultana
#include<iostream>
#include<vector>
using namespace std;

int main() {
    int a = 10;
    int* ptr = &a;
    int** parPtr = &ptr;
    cout << ptr << endl;
    cout << parPtr << endl;
    cout << *(&a) << endl;
    cout << *(ptr) << endl;
    cout << *(parPtr) << endl;
    cout << **(parPtr) << endl;
    return 0;
}