D702 Sample Program

import java.util.*;
//import java.util.Scanner;

class D702 {
    public static Stack<Integer> S = new Stack<Integer>();

    public static void main(String[] args) {
        Scanner inp = new Scanner(System.in);
        String line;
        int N;

        // Get the number of commands
        N = inp.nextInt();

        // Foreach command, do the processing on the stack.
        for (int i=0; i<N; i++) {
            // Read in the command and process it.
            line = inp.nextLine();
            if (line.equals("TOP")) {
                // DIY

            } else if (line.equals("POP")) {
                // DIY

            } else if (line.equals("SIZE")) {
                // DIY

            } else if (line.startsWith("PUSH")) {
                // Take the integer from the line
                String sNum = line.substring(5);
                int iNum = Integer.parseInt(sNum);
                // System.out.println(iNum);
                // DIY

            }



        }

    }




}