#include <iostream>
using namespace std;

int k;

int main() {
    cout << "  k: " <<   k << endl;
    cout << "::k: " << ::k << endl;

    int k = 10;

    cout << "  k: " <<   k << endl;
    cout << "::k: " << ::k << endl;

    ::k = 1;

    cout << "  k: " <<   k << endl;
    cout << "::k: " << ::k << endl;

    {
        int k = 77;
        cout << "W bloku:"     << endl;
        cout << "  k: " <<   k << endl;
        cout << "::k: " << ::k << endl;
    }

    cout << "Po bloku:" << endl;
    cout << "  k: " <<   k << endl;
    cout << "::k: " << ::k << endl;
}