serg

import java.util.*;

public class Main {
    public static void main(String[] args) {
        Stack<Integer> st = new Stack<Integer>();

        for (int i = 0; i <= 5; i++) { //// am loopa tanha zhmara 0 ta 5 axata stack akawa
            st.push(i);
        }
        int[] b = new int[st.size()]; //// lera arrayak drwstakayn ka size akay baqadar stack aka bet

        for (int i = 0; i < b.length; i++) { /// amloopa baqaday size y arrayaka dwbara abetawa kahaman size stack akaya
            b[i] = st.pop(); /// lera nrxakan la stack aka darakayn w ayxayna naw arrayaka
        }
        System.out.println(b[0]);
    }
}