1#include <iostream>
2using namespace std;
3int main() {
4    int arr[4] = {1, 2, 3, 4};
5    for (int i = 0; i < 4; i++) {
6        arr[i] *= arr[i];
7    }
8    cout << arr[0] << " " << arr[3] << endl;
9    return 0;
10}