{"id":312622,"date":"2020-11-05T21:00:20","date_gmt":"2020-11-05T21:00:20","guid":{"rendered":"http:\/\/savepearlharbor.com\/?p=312622"},"modified":"-0001-11-30T00:00:00","modified_gmt":"-0001-11-29T21:00:00","slug":"","status":"publish","type":"post","link":"https:\/\/savepearlharbor.com\/?p=312622","title":{"rendered":"\u041f\u0438\u0448\u0435\u043c \u0441\u0432\u043e\u0439 \u0430\u043d\u0430\u043b\u043e\u0433 Wolfram|Alpha"},"content":{"rendered":"\n<div class=\"post__text post__text-html post__text_v1\" id=\"post-content-body\">\n<p>\u0414\u043e\u043f\u0443\u0441\u0442\u0438\u043c, \u0432 \u043a\u0430\u043a\u043e\u0439-\u0442\u043e \u043c\u043e\u043c\u0435\u043d\u0442 \u0432\u0440\u0435\u043c\u0435\u043d\u0438, \u0442\u0435\u0431\u0435, \u043c\u043e\u0439 \u0434\u043e\u0440\u043e\u0433\u043e\u0439 \u0434\u0440\u0443\u0433, \u0437\u0430\u0445\u043e\u0442\u0435\u043b\u043e\u0441\u044c \u0443\u0437\u043d\u0430\u0442\u044c, \u0430 \u0447\u0442\u043e \u0436\u0435 \u043d\u0430\u0445\u043e\u0434\u0438\u0442\u0441\u044f \u043f\u043e\u0434 \u043a\u0430\u043f\u043e\u0442\u043e\u043c \u0443 \u043c\u0430\u0442\u0435\u043c\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u043e\u0433\u043e \u0434\u0432\u0438\u0436\u043a\u0430 \u0438 \u0432\u0434\u0440\u0443\u0433 \u0437\u0430\u0433\u043e\u0440\u0435\u043b\u0441\u044f \u043d\u0430\u043f\u0438\u0441\u0430\u0442\u044c \u0441\u0432\u043e\u0439? \u0422\u043e\u0433\u0434\u0430 \u043c\u0438\u043b\u043e\u0441\u0442\u0438 \u043f\u0440\u043e\u0448\u0443 \u043f\u043e\u0434 \u043a\u0430\u0442.<\/p>\n<p>  <\/p>\n<p><img decoding=\"async\" src=\"https:\/\/habrastorage.org\/webt\/xw\/1k\/yl\/xw1kyl4o8wwnyyydlfqmrovvusc.jpeg\"><\/p>\n<p><a name=\"habracut\"><\/a>  <\/p>\n<p>\u041d\u0443-\u0441, \u043d\u0430\u0447\u043d\u0435\u043c!<\/p>\n<p>  <\/p>\n<h2 id=\"postanovka-zadachi\">\u041f\u043e\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0430 \u0437\u0430\u0434\u0430\u0447\u0438<\/h2>\n<p>  <\/p>\n<p>\u0412\u043e\u0437\u044c\u043c\u0435\u043c \u043f\u0440\u043e\u0441\u0442\u043e\u0439 \u0441\u043b\u0443\u0447\u0430\u0439: \u0441\u043b\u043e\u0436\u0435\u043d\u0438\u0435 \u0438 \u0432\u044b\u0447\u0438\u0442\u0430\u043d\u0438\u0435 (\u0431\u0435\u0437 \u0441\u043a\u043e\u0431\u043e\u043a). \u041d\u0430\u0434\u043e \u0436\u0435 \u0441 \u0447\u0435\u0433\u043e-\u0442\u043e \u043d\u0430\u0447\u0430\u0442\u044c? \u0417\u0430\u0442\u0435\u043c \u0431\u0443\u0434\u0435\u043c \u043f\u043e\u0441\u0442\u0435\u043f\u0435\u043d\u043d\u043e \u0434\u043e\u0440\u0430\u0431\u0430\u0442\u044b\u0432\u0430\u0442\u044c \u0438 \u043d\u0430\u0440\u0430\u0449\u0438\u0432\u0430\u0442\u044c \u0444\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b.<\/p>\n<p>  <\/p>\n<p>\u0425\u043e\u0442\u0438\u043c, \u0447\u0442\u043e\u0431\u044b \u043d\u0430\u0448 \u0434\u0432\u0438\u0436\u043e\u043a \u043c\u043e\u0433 \u043e\u0431\u0440\u0430\u0431\u0430\u0442\u044b\u0432\u0430\u0442\u044c \u0442\u0430\u043a\u0438\u0435 \u043c\u0430\u0442\u0435\u043c\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0435 \u0432\u044b\u0440\u0430\u0436\u0435\u043d\u0438\u044f:<\/p>\n<p>  <\/p>\n<ul>\n<li>125 + 375<\/li>\n<li>15.25 + 7.90 + 3.12<\/li>\n<li>1200 \u2014 450<\/li>\n<li>10 \u2014 9 + 8 \u2014 7 + 6 \u2014 5 + 4 \u2014 3 + 2 \u2014 1<\/li>\n<\/ul>\n<p>  <\/p>\n<h2 id=\"formalizaciya\">\u0424\u043e\u0440\u043c\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f<\/h2>\n<p>  <\/p>\n<p>\u041f\u0435\u0440\u0432\u044b\u043c \u0434\u0435\u043b\u043e\u043c, \u043d\u0430\u043c \u043d\u0430\u0434\u043e \u043f\u043e\u043d\u044f\u0442\u044c, \u043a\u0430\u043a \u0440\u0430\u0437\u043e\u0431\u0440\u0430\u0442\u044c \u043c\u0430\u0442\u0435\u043c\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u043e\u0435 \u0432\u044b\u0440\u0430\u0436\u0435\u043d\u0438\u0435 \u043d\u0430 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0449\u0438\u0435: \u0431\u0435\u0437 \u044d\u0442\u043e\u0433\u043e \u043c\u044b \u043d\u0435 \u043f\u0440\u043e\u0434\u0432\u0438\u043d\u0435\u043c\u0441\u044f \u0434\u0430\u043b\u044c\u0448\u0435 \u2014 \u043d\u0430 \u0447\u0438\u0441\u043b\u0430 \u0438 \u0437\u043d\u0430\u043a\u0438 \u043c\u0430\u0442\u0435\u043c\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0445 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0439. \u041d\u0430\u043f\u0438\u0448\u0435\u043c \u0433\u0440\u0430\u043c\u043c\u0430\u0442\u0438\u043a\u0443 (\u0433\u0440\u043e\u043c\u043a\u043e \u0441\u043a\u0430\u0437\u0430\u043d\u043e, \u0441\u043a\u043e\u0440\u0435\u0435 \u0430\u0434\u0441\u043a\u0443\u044e \u0441\u043c\u0435\u0441\u044c \u0440\u0435\u0433\u0443\u043b\u044f\u0440\u043d\u044b\u0445 \u0432\u044b\u0440\u0430\u0436\u0435\u043d\u0438\u0439):<\/p>\n<p>  <\/p>\n<pre><code class=\"plaintext\">expression := expression '+' expression     | expression '-' expression     | NUMBER NUMBER := [0-9]+<\/code><\/pre>\n<p>  <\/p>\n<h2 id=\"napisanie-leksera\">\u041d\u0430\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u043b\u0435\u043a\u0441\u0435\u0440\u0430<\/h2>\n<p>  <\/p>\n<p>\u0412\u0437\u0433\u043b\u044f\u043d\u0435\u043c \u043d\u0430 \u043a\u043b\u0430\u0441\u0441 <strong>java.util.Scanner<\/strong>, \u0432 \u0447\u0430\u0441\u0442\u043d\u043e\u0441\u0442\u0438 \u043d\u0430 \u043c\u0435\u0442\u043e\u0434\u044b:<\/p>\n<p>  <\/p>\n<ul>\n<li>boolean hasNextDouble()<\/li>\n<li>double nextDouble()<\/li>\n<li>boolean hasNext(Pattern pattern)<\/li>\n<li>String next(Pattern pattern)<\/li>\n<\/ul>\n<p>  <\/p>\n<p>\u0414\u0430 \u044d\u0442\u043e \u0436\u0435 \u0442\u043e, \u0447\u0442\u043e \u043d\u0430\u043c \u043d\u0443\u0436\u043d\u043e! \u0421\u043e\u0437\u0434\u0430\u0434\u0438\u043c \u043a\u043b\u0430\u0441\u0441 <strong>ArsenicTau<\/strong> \u0441\u043e \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u043c \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u043c\u044b\u043c (\u043a\u0443\u0434\u0430 \u0436\u0435 \u0431\u0435\u0437 \u044d\u043b\u0435\u043c\u0435\u043d\u0442\u0430 \u043f\u0435\u0440\u0438\u043e\u0434\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0438 \u0433\u0440\u0435\u0447\u0435\u0441\u043a\u043e\u0439 \u0431\u0443\u043a\u0432\u044b \u2014 \u043c\u044b \u0436\u0435 \u0441\u043e\u0437\u0434\u0430\u0435\u043c \u0430\u043d\u0430\u043b\u043e\u0433 W|A):<\/p>\n<p>  <\/p>\n<pre><code class=\"java\">import java.util.ArrayList; import java.util.Scanner;  public class ArsenicTau {     public static void main(String[] args) {         var scanner = new Scanner(System.in);         var tokens = new ArrayList&lt;String&gt;();          for (; ; ) {             if (scanner.hasNextDouble()) {                 var number = scanner.nextDouble();                 tokens.add(String.valueOf(number));             } else if (scanner.hasNext(&quot;[+-]&quot;)) {                 var operator = scanner.next(&quot;[+-]&quot;);                 tokens.add(operator);             } else {                 break;             }         }          System.out.println(tokens);     } }<\/code><\/pre>\n<p>  <\/p>\n<p>\u0417\u0430\u043f\u0443\u0441\u043a\u0430\u0435\u043c, \u0441\u043c\u043e\u0442\u0440\u0438\u043c:<\/p>\n<p>  <\/p>\n<pre><code class=\"plaintext\">125 + 375 ^D [125.0, +, 375.0]<\/code><\/pre>\n<p>  <\/p>\n<pre><code class=\"plaintext\">15.25 + 7.90 + 3.12 ^D [15.25, +, 7.9, +, 3.12]<\/code><\/pre>\n<p>  <\/p>\n<pre><code class=\"plaintext\">1200 - 450 ^D [1200.0, -, 450.0]<\/code><\/pre>\n<p>  <\/p>\n<pre><code class=\"plaintext\">10 - 9 + 8 - 7 + 6 - 5 + 4 - 3 + 2 - 1 ^D [10.0, -, 9.0, +, 8.0, -, 7.0, +, 6.0, -, 5.0, +, 4.0, -, 3.0, +, 2.0, -, 1.0]<\/code><\/pre>\n<p>  <\/p>\n<p>\u0413\u0443\u0434. \u0422\u0435\u043f\u0435\u0440\u044c \u0432\u044b\u0434\u0435\u043b\u0438\u043c \u043a\u043b\u0430\u0441\u0441 <strong>Token<\/strong>:<\/p>\n<p>  <\/p>\n<pre><code class=\"java\">import java.util.regex.Pattern;  public class Token {     private final TokenType type;     private final String value;      public Token(TokenType type, String value) {         this.type = type;         this.value = value;     }      @Override     public String toString() {         return &quot;Token{&quot; +                 &quot;type=&quot; + type +                 &quot;, value='&quot; + value + '\\'' +                 '}';     }      public enum TokenType {         NUMBER(&quot;&quot;),         PLUS(&quot;\\\\+&quot;),         MINUS(&quot;-&quot;),         ;          private final Pattern pattern;          TokenType(String pattern) {             this.pattern = Pattern.compile(pattern);         }          public Pattern getPattern() {             return pattern;         }     } }<\/code><\/pre>\n<p>  <\/p>\n<p>\u041f\u0440\u0430\u0432\u0438\u043c \u0444\u0443\u043d\u043a\u0446\u0438\u044e <strong>ArsenicTau.main(String[])<\/strong>:<\/p>\n<p>  <\/p>\n<pre><code class=\"java\">... var tokens = new ArrayList&lt;Token&gt;(); ... for (; ; ) {     Token.TokenType type;     String value;      if (scanner.hasNextDouble()) {         var number = scanner.nextDouble();         type = Token.TokenType.NUMBER;         value = String.valueOf(number);     } else if (scanner.hasNext(Token.TokenType.MINUS.getPattern())) {         type = Token.TokenType.MINUS;         value = scanner.next(type.getPattern());     } else if (scanner.hasNext(Token.TokenType.PLUS.getPattern())) {         type = Token.TokenType.PLUS;         value = scanner.next(type.getPattern());     } else {         break;     }      var token = new Token(type, value);     tokens.add(token); }<\/code><\/pre>\n<p>  <\/p>\n<p>\u0421\u043c\u043e\u0442\u0440\u0438\u043c, \u0447\u0442\u043e \u043f\u043e\u043b\u0443\u0447\u0438\u043b\u043e\u0441\u044c:<\/p>\n<p>  <\/p>\n<pre><code class=\"plaintext\">125 + 375 ^D [Token{type=NUMBER, value='125.0'}, Token{type=PLUS, value='+'}, Token{type=NUMBER, value='375.0'}]<\/code><\/pre>\n<p>  <\/p>\n<pre><code class=\"plaintext\">15.25 + 7.90 + 3.12 ^D [Token{type=NUMBER, value='15.25'}, Token{type=PLUS, value='+'}, Token{type=NUMBER, value='7.9'}, Token{type=PLUS, value='+'}, Token{type=NUMBER, value='3.12'}]<\/code><\/pre>\n<p>  <\/p>\n<pre><code class=\"plaintext\">1200 - 450 ^D [Token{type=NUMBER, value='1200.0'}, Token{type=MINUS, value='-'}, Token{type=NUMBER, value='450.0'}]<\/code><\/pre>\n<p>  <\/p>\n<pre><code class=\"plaintext\">10 - 9 + 8 - 7 + 6 - 5 + 4 - 3 + 2 - 1 ^D [Token{type=NUMBER, value='10.0'}, Token{type=MINUS, value='-'}, Token{type=NUMBER, value='9.0'}, Token{type=PLUS, value='+'}, Token{type=NUMBER, value='8.0'}, Token{type=MINUS, value='-'}, Token{type=NUMBER, value='7.0'}, Token{type=PLUS, value='+'}, Token{type=NUMBER, value='6.0'}, Token{type=MINUS, value='-'}, Token{type=NUMBER, value='5.0'}, Token{type=PLUS, value='+'}, Token{type=NUMBER, value='4.0'}, Token{type=MINUS, value='-'}, Token{type=NUMBER, value='3.0'}, Token{type=PLUS, value='+'}, Token{type=NUMBER, value='2.0'}, Token{type=MINUS, value='-'}, Token{type=NUMBER, value='1.0'}]<\/code><\/pre>\n<p>  <\/p>\n<h2 id=\"napisanie-parsera\">\u041d\u0430\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u043f\u0430\u0440\u0441\u0435\u0440\u0430<\/h2>\n<p>  <\/p>\n<p>\u0421 \u043b\u0435\u043a\u0441\u0435\u0440\u043e\u043c \u0441\u043f\u0440\u0430\u0432\u0438\u043b\u0438\u0441\u044c. \u041e\u0441\u0442\u0430\u043b\u043e\u0441\u044c \u0434\u0435\u043b\u043e \u0437\u0430 \u043c\u0430\u043b\u044b\u043c: \u043f\u0438\u0448\u0435\u043c \u043f\u0430\u0440\u0441\u0435\u0440. \u0428\u0443\u0447\u0443. \u0420\u0430\u043d\u043e \u0435\u0449\u0435. \u0412\u044b\u0434\u0435\u043b\u0438\u043c \u0438\u043d\u0442\u0435\u0440\u0444\u0435\u0439\u0441 <strong>Expression<\/strong>:<\/p>\n<p>  <\/p>\n<pre><code class=\"java\">public interface Expression {     double evaluate(); }<\/code><\/pre>\n<p>  <\/p>\n<p>\u0417\u0430\u0442\u0435\u043c \u0438\u043d\u0442\u0435\u0440\u0444\u0435\u0439\u0441 <strong>BinaryOperator<\/strong>:<\/p>\n<p>  <\/p>\n<pre><code class=\"java\">public interface BinaryOperator extends Expression {     double apply(double x, double y); }<\/code><\/pre>\n<p>  <\/p>\n<p>\u0418\u043c\u043f\u043b\u0435\u043c\u0435\u043d\u0442\u0438\u0440\u0443\u0435\u043c \u043a\u043b\u0430\u0441\u0441 <strong>Constant<\/strong>:<\/p>\n<p>  <\/p>\n<pre><code class=\"java\">public class Constant implements Expression {     private double value;      public Constant(double value) {         this.value = value;     }      @Override     public double evaluate() {         return value;     }      @Override     public String toString() {         return &quot;Constant{&quot; +                 &quot;value=&quot; + value +                 '}';     } }<\/code><\/pre>\n<p>  <\/p>\n<p>\u0420\u0435\u0430\u043b\u0438\u0437\u0443\u0435\u043c \u043e\u0431\u0449\u0438\u0435 \u043c\u0435\u0442\u043e\u0434\u044b \u043e\u043f\u0435\u0440\u0430\u0442\u043e\u0440\u043e\u0432 \u0432 \u0430\u0431\u0441\u0442\u0440\u0430\u043a\u0442\u043d\u043e\u043c \u043a\u043b\u0430\u0441\u0441\u0435 <strong>AbstractBinaryOperator<\/strong>:<\/p>\n<p>  <\/p>\n<pre><code class=\"java\">public abstract class AbstractBinaryOperator implements BinaryOperator {     private final Expression x;     private final Expression y;      protected AbstractBinaryOperator(Expression x, Expression y) {         this.x = x;         this.y = y;     }      @Override     public double evaluate() {         return apply(x.evaluate(), y.evaluate());     }      @Override     public String toString() {         return getClass().getSimpleName() + &quot;{&quot; +                 &quot;x=&quot; + x +                 &quot;, y=&quot; + y +                 '}';     } }<\/code><\/pre>\n<p>  <\/p>\n<p>\u0417\u0430\u0442\u0435\u043c, \u0441\u043e\u0431\u0441\u0442\u0432\u0435\u043d\u043d\u043e, \u0441\u0430\u043c\u0438 \u043e\u043f\u0435\u0440\u0430\u0442\u043e\u0440\u044b <strong>Add<\/strong>, <strong>Subtract<\/strong>:<\/p>\n<p>  <\/p>\n<pre><code class=\"java\">public class Add extends AbstractBinaryOperator {     protected Add(Expression x, Expression y) {         super(x, y);     }      @Override     public double apply(double x, double y) {         return x + y;     } }<\/code><\/pre>\n<p>  <\/p>\n<pre><code class=\"java\">public class Subtract extends AbstractBinaryOperator {     protected Subtract(Expression x, Expression y) {         super(x, y);     }      @Override     public double apply(double x, double y) {         return x - y;     } }<\/code><\/pre>\n<p>  <\/p>\n<p>\u0424\u0443\u0445! \u0422\u0435\u043f\u0435\u0440\u044c \u043c\u044b \u043d\u0430\u043a\u043e\u043d\u0435\u0446-\u0442\u043e \u0433\u043e\u0442\u043e\u0432\u044b \u043a \u0441\u0430\u043c\u043e\u043c\u0443 \u0438\u043d\u0442\u0435\u0440\u0435\u0441\u043d\u043e\u043c\u0443: \u043f\u043e\u044f\u0432\u043b\u0435\u043d\u0438\u044e \u0432\u0438\u043d\u043e\u0432\u043d\u0438\u043a\u0430 \u0442\u043e\u0440\u0436\u0435\u0441\u0442\u0432\u0430 \u2014 \u043f\u0430\u0440\u0441\u0435\u0440 \u0441\u043e\u0431\u0441\u0442\u0432\u0435\u043d\u043d\u043e\u0439 \u043f\u0435\u0440\u0441\u043e\u043d\u043e\u0439. \u041e\u043f\u0440\u0435\u0434\u0435\u043b\u0438\u043c \u0438\u043d\u0442\u0435\u0440\u0444\u0435\u0439\u0441 <strong>Parser<\/strong>:<\/p>\n<p>  <\/p>\n<pre><code class=\"java\">import java.util.List;  public interface Parser {     Expression parse(List&lt;Token&gt; tokens); }<\/code><\/pre>\n<p>  <\/p>\n<p>\u0420\u0435\u0430\u043b\u0438\u0437\u0443\u0435\u043c <a href=\"https:\/\/ru.wikibooks.org\/wiki\/%D0%A0%D0%B5%D0%B0%D0%BB%D0%B8%D0%B7%D0%B0%D1%86%D0%B8%D0%B8_%D0%B0%D0%BB%D0%B3%D0%BE%D1%80%D0%B8%D1%82%D0%BC%D0%BE%D0%B2\/%D0%9C%D0%B5%D1%82%D0%BE%D0%B4_%D1%80%D0%B5%D0%BA%D1%83%D1%80%D1%81%D0%B8%D0%B2%D0%BD%D0%BE%D0%B3%D0%BE_%D1%81%D0%BF%D1%83%D1%81%D0%BA%D0%B0\" rel=\"nofollow\">\u043c\u0435\u0442\u043e\u0434 \u0440\u0435\u043a\u0443\u0440\u0441\u0438\u0432\u043d\u043e\u0433\u043e \u0441\u043f\u0443\u0441\u043a\u0430<\/a> \u0432 \u043a\u043b\u0430\u0441\u0441\u0435 <strong>ParserImpl<\/strong>:<\/p>\n<p>  <\/p>\n<pre><code class=\"java\">import java.util.List; import java.util.ListIterator; import java.util.Objects;  public class ParserImpl implements Parser {     private List&lt;Token&gt; tokens;     private ListIterator&lt;Token&gt; iterator;      @Override     public Expression parse(List&lt;Token&gt; tokens) {         Objects.requireNonNull(tokens, &quot;tokens can't be null&quot;);          this.tokens = tokens;         this.iterator = tokens.listIterator();          return expression();     }      private Expression expression() {         var x = primary();          while (iterator.hasNext()) {             var operator = iterator.next();             var y = primary();              var type = operator.getType();              if (Token.TokenType.PLUS.equals(type)) {                 x = new Add(x, y);             } else if (Token.TokenType.MINUS.equals(type)) {                 x = new Subtract(x, y);             } else {                 return x;             }         }          return x;     }      private Expression primary() {         if (!iterator.hasNext()) {             throw new IllegalStateException(&quot;expected primary but not found&quot;);         }          var token = iterator.next();          if (Token.TokenType.NUMBER.equals(token.getType())) {             var value = Double.parseDouble(token.getValue());             return new Constant(value);         } else {             throw new IllegalStateException(&quot;expected token but found [&quot; + token + &quot;]&quot;);         }     } }<\/code><\/pre>\n<p>  <\/p>\n<p>\u0414\u043e\u043f\u0438\u0448\u0435\u043c \u043d\u0430\u0448 \u043e\u0441\u043d\u043e\u0432\u043d\u043e\u0439 \u043c\u0435\u0442\u043e\u0434 <strong>ArsenicTau.main(String[])<\/strong>:<\/p>\n<p>  <\/p>\n<pre><code class=\"java\">... var parser = new ParserImpl(); var expression = parser.parse(tokens); System.out.println(expression); System.out.println(expression.evaluate());<\/code><\/pre>\n<p>  <\/p>\n<p>\u041f\u0440\u043e\u0432\u0435\u0440\u044f\u0435\u043c:<\/p>\n<p>  <\/p>\n<pre><code class=\"plaintext\">125 + 375 ^D Add{x=Constant{value=125.0}, y=Constant{value=375.0}} 500.0<\/code><\/pre>\n<p>  <\/p>\n<pre><code class=\"plaintext\">15.25 + 7.90 + 3.12 ^D Add{x=Add{x=Constant{value=15.25}, y=Constant{value=7.9}}, y=Constant{value=3.12}} 26.27<\/code><\/pre>\n<p>  <\/p>\n<pre><code class=\"plaintext\">1200 - 450 ^D Subtract{x=Constant{value=1200.0}, y=Constant{value=450.0}} 750.0<\/code><\/pre>\n<p>  <\/p>\n<pre><code class=\"plaintext\">10 - 9 + 8 - 7 + 6 - 5 + 4 - 3 + 2 - 1 ^D Subtract{x=Add{x=Subtract{x=Add{x=Subtract{x=Add{x=Subtract{x=Add{x=Subtract{x=Constant{value=10.0}, y=Constant{value=9.0}}, y=Constant{value=8.0}}, y=Constant{value=7.0}}, y=Constant{value=6.0}}, y=Constant{value=5.0}}, y=Constant{value=4.0}}, y=Constant{value=3.0}}, y=Constant{value=2.0}}, y=Constant{value=1.0}} 5.0<\/code><\/pre>\n<p>  <\/p>\n<h2 id=\"podvedem-itogi\">\u041f\u043e\u0434\u0432\u0435\u0434\u0435\u043c \u0438\u0442\u043e\u0433\u0438<\/h2>\n<p>  <\/p>\n<ul>\n<li>\u043d\u0430\u043f\u0438\u0441\u0430\u043b\u0438 \u043b\u0435\u043a\u0441\u0435\u0440<\/li>\n<li>\u043d\u0430\u043f\u0438\u0441\u0430\u043b\u0438 \u043f\u0430\u0440\u0441\u0435\u0440<\/li>\n<li>\u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043b\u0438 \u0431\u0438\u043d\u0430\u0440\u043d\u044b\u0435 \u043e\u043f\u0435\u0440\u0430\u0442\u043e\u0440\u044b \u0441\u043b\u043e\u0436\u0435\u043d\u0438\u044f \u0438 \u0432\u044b\u0447\u0438\u0442\u0430\u043d\u0438\u044f<\/li>\n<\/ul>\n<\/div>\n<p> \u0441\u0441\u044b\u043b\u043a\u0430 \u043d\u0430 \u043e\u0440\u0438\u0433\u0438\u043d\u0430\u043b \u0441\u0442\u0430\u0442\u044c\u0438 <a href=\"https:\/\/habr.com\/ru\/post\/526656\/\"> https:\/\/habr.com\/ru\/post\/526656\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"\n<div class=\"post__text post__text-html post__text_v1\" id=\"post-content-body\">\n<p>\u0414\u043e\u043f\u0443\u0441\u0442\u0438\u043c, \u0432 \u043a\u0430\u043a\u043e\u0439-\u0442\u043e \u043c\u043e\u043c\u0435\u043d\u0442 \u0432\u0440\u0435\u043c\u0435\u043d\u0438, \u0442\u0435\u0431\u0435, \u043c\u043e\u0439 \u0434\u043e\u0440\u043e\u0433\u043e\u0439 \u0434\u0440\u0443\u0433, \u0437\u0430\u0445\u043e\u0442\u0435\u043b\u043e\u0441\u044c \u0443\u0437\u043d\u0430\u0442\u044c, \u0430 \u0447\u0442\u043e \u0436\u0435 \u043d\u0430\u0445\u043e\u0434\u0438\u0442\u0441\u044f \u043f\u043e\u0434 \u043a\u0430\u043f\u043e\u0442\u043e\u043c \u0443 \u043c\u0430\u0442\u0435\u043c\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u043e\u0433\u043e \u0434\u0432\u0438\u0436\u043a\u0430 \u0438 \u0432\u0434\u0440\u0443\u0433 \u0437\u0430\u0433\u043e\u0440\u0435\u043b\u0441\u044f \u043d\u0430\u043f\u0438\u0441\u0430\u0442\u044c \u0441\u0432\u043e\u0439? \u0422\u043e\u0433\u0434\u0430 \u043c\u0438\u043b\u043e\u0441\u0442\u0438 \u043f\u0440\u043e\u0448\u0443 \u043f\u043e\u0434 \u043a\u0430\u0442.<\/p>\n<p>  <\/p>\n<p><img decoding=\"async\" src=\"https:\/\/habrastorage.org\/webt\/xw\/1k\/yl\/xw1kyl4o8wwnyyydlfqmrovvusc.jpeg\"><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-312622","post","type-post","status-publish","format-standard","hentry"],"_links":{"self":[{"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=\/wp\/v2\/posts\/312622","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=312622"}],"version-history":[{"count":0,"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=\/wp\/v2\/posts\/312622\/revisions"}],"wp:attachment":[{"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=312622"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=312622"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=312622"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}