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  1. import java.io.PrintStream;
  2. import java.util.Scanner;
  3.  
  4. class Stack {
  5.     private static Scanner in = new Scanner(System.in);
  6.     class StackElement {
  7.         private int data;
  8.         private StackElement next;
  9.         StackElement(int data, StackElement next) {
  10.             this.data = data;
  11.             this.next = next;
  12.         }
  13.     }
  14.     private StackElement top = null;
  15.     public void push(int chto) {
  16.         top = new StackElement(chto, top);
  17.     }
  18.     public int pop() {
  19.         int res = top.data;
  20.         top = top.next;
  21.         return res;
  22.     }
  23.     public boolean isEmpty() {
  24.         return top == null;
  25.     }
  26.     public void swap() {
  27.         int x = 1001, y = 1001;
  28.         if (isEmpty())
  29.             System.out.println("Stack is empty!");
  30.         else
  31.             x = pop();
  32.         if (isEmpty())
  33.             System.out.println("Stack is empty!");
  34.         else
  35.             y = pop();
  36.         push(x);
  37.         push(y);
  38.     }
  39.     public void dup() {
  40.         int x = 1001;
  41.         if (isEmpty())
  42.             System.out.println("Stack is empty!");
  43.         else
  44.             x = pop();
  45.         push(x);
  46.         push(x);
  47.     }
  48.     public void dup2nd() {
  49.         int x = 1001, y = 1001;
  50.         if (isEmpty())
  51.             System.out.println("Stack is empty!");
  52.         else
  53.             x = pop();
  54.         if (isEmpty())
  55.             System.out.println("Stack is empty!");
  56.         else
  57.             y = pop();
  58.         push(y);
  59.         push(y);
  60.         push(x);
  61.     }
  62.     public void readPush() {
  63.         int x = in.nextInt();
  64.         push(x);
  65.     }
  66. }
  67.  
  68. public class Main {
  69.     public static PrintStream out = System.out;
  70.     public static void main(String[] args)
  71.     {
  72.         Stack a = new Stack();
  73.         a.readPush();
  74.         a.dup();
  75.         a.readPush();
  76.         a.push(-a.pop() + a.pop());
  77.         a.dup2nd();
  78.         a.swap();
  79.         a.dup2nd();
  80.         a.push(a.pop()-a.pop());
  81.         a.swap();
  82.         a.readPush();
  83.         a.readPush();
  84.         a.push(-a.pop() + a.pop() + Math.abs(a.pop()*(a.pop()/a.pop())));
  85.         out.print(a.pop());
  86.  
  87.     }
  88. }
Success #stdin #stdout 0.1s 35476KB
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https://ideone.com/HlnLQ6
language:
Java (HotSpot 12)
created:
4 years ago
visibility:
public

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