Merge pull request #10 from LyashenkoGS/DFSmethods

Simplest working algorithms

Author: LyashenkoGS

.gitignore

@@ -1,6 +1,12 @@
-#Java and Intellij specific
+#Java and Intellij & Eclipse specific
 .idea
 *.iml
+.project
+.classpath
+.project
 target
-#ignore the archived source code
-*.zip
+#ignore the archived source code and output files
+/outputDataSet/*
+*.zip
+/.classpath
+.settings/

README.md

@@ -1,10 +1,11 @@
 # GoogleHashCode2017  
-
-[![Join the chat at https://gitter.im/GoogleHashCode2017/Lobby](https://badges.gitter.im/GoogleHashCode2017/Lobby.svg)](https://gitter.im/GoogleHashCode2017/Lobby?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 ![google hash code logo](./documentation/logo.png)
+hash tags: #hashcode #2017 #googleHashCode 
+[![Join the chat at https://gitter.im/GoogleHashCode2017/Lobby](https://badges.gitter.im/GoogleHashCode2017/Lobby.svg)](https://gitter.im/GoogleHashCode2017/Lobby?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+[![Build Status](https://travis-ci.org/LyashenkoGS/GoogleHashCode2017.svg?branch=master)](https://travis-ci.org/LyashenkoGS/GoogleHashCode2017)
 
 ##Pizza
-Practice problem for the Google HashCode 2017
+Practice problem for the Google HashCode 2017. Current version works correctly for example input only.
 
 * original assignment - [Task.pdf](./documentation/TaskDescription.pdf)
 * [input data sets](./inputDataSets)
@@ -33,6 +34,6 @@ To automate interaction with online submission can be used [SeleniumIDE](https:/
  with a firefox browser.
 * login  to the [submission page](https://hashcodejudge.withgoogle.com/#/rounds/6553823069863936/submissions/)
 * setup selenium test suite(submitResultsViaSelenium) according to yours file system 
-* execute the test case and see scores on web
+* execute the test case and see scores on web. See the [video instruction on YouTube](https://www.youtube.com/watch?v=Wg7s3CtIeCs&feature=youtu.be)
 
 

outputDataSet/example.txt

@@ -1,4 +1,4 @@
 3
-0 0 2 1
 0 2 2 2
-0 3 2 4
+0 3 2 4
+0 0 2 1

pom.xml

@@ -24,6 +24,21 @@
             <version>4.12</version>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-api</artifactId>
+            <version>1.7.21</version>
+        </dependency>
+        <dependency>
+            <groupId>ch.qos.logback</groupId>
+            <artifactId>logback-core</artifactId>
+            <version>1.1.7</version>
+        </dependency>
+        <dependency>
+            <groupId>ch.qos.logback</groupId>
+            <artifactId>logback-classic</artifactId>
+            <version>1.1.7</version>
+        </dependency>
     </dependencies>
 
 </project>

src/main/java/com/google/hashcode/App.java

@@ -1,22 +1,50 @@
 package com.google.hashcode;
 
-import com.google.hashcode.entity.Cell;
 import com.google.hashcode.entity.Pizza;
+import com.google.hashcode.entity.Slice;
+import com.google.hashcode.entity.Step;
+import com.google.hashcode.utils.DFSMethods;
 import com.google.hashcode.utils.IoUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import java.io.File;
 import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+
+import static com.google.hashcode.utils.FilesPaths.*;
 
 
 public class App {
-    public static void main(String[] args) throws IOException {
-        String exampleInputFile = "inputDataSets/example.in";
-        Cell[][] ingredients = IoUtils.parsePizza(exampleInputFile);
-        Pizza pizza = new Pizza(new File(exampleInputFile), ingredients, IoUtils.parseSliceInstructions(exampleInputFile));
+    private static final Logger LOGGER = LoggerFactory.getLogger(App.class);
 
-        System.out.println("GoogleHashCode2017! Pizza task");
-        System.out.print(pizza);
+    public static void main(String[] args) throws IOException {
+        slicePizza(EXAMPLE_INPUT_FILE_PATH, OUTPUT_DATA_SET_EXAMPLE_TXT);
+        slicePizza(SMALL_INPUT_FILE_PATH, OUTPUT_DATA_SET_SMALL_TXT);
+        //TODO troubles to input big files, possible exciting String max size
+        //slicePizza(BIG_INPUT_FILE_PATH, OUTPUT_DATA_SET_BIG_TXT);
+        //slicePizza(MEDIUM_INPUT_FILE_PATH, OUTPUT_DATA_SET_MEDIUM_TXT);
+    }
 
+    public static void slicePizza(String inputFile, String outputFile) throws IOException {
+        List<Slice> output;
+        Pizza pizza = new Pizza(new File(inputFile), IoUtils.parsePizza(inputFile), IoUtils.parseSliceInstructions(inputFile));
+        //get start positions
+        output = DFSMethods.cutAllStartPositions(pizza);
+        //get All steps
+        Map<Slice, List<Step>> availableSteps = DFSMethods.getAvailableSteps(pizza, output);
+        while (!availableSteps.values().stream().allMatch(List::isEmpty)) {
+            Step step = DFSMethods.selectStep(availableSteps);
+            output.remove(step.startPosition);
+            output.add(DFSMethods.performStep(pizza, step));
+            //TODO available steps should include merging slices to each other
+            availableSteps = DFSMethods.getAvailableSteps(pizza, output);
+            LOGGER.info("OUTPUT AFTER A STEP: "
+                    + "\n " + output);
+        }
+        IoUtils.writeToFile(outputFile, IoUtils.parseSlices(output));
+        LOGGER.info("FINISHED for " + inputFile + "!!!!!");
     }
 
 }

src/main/java/com/google/hashcode/entity/Cell.java

@@ -1,23 +1,48 @@
 package com.google.hashcode.entity;
 
+import java.util.Objects;
+
 /**
  * Represents a pizza cell with it coordinates. There is no getters/setters for simplicity
  *
  * @author Grigoriy Lyashenko (Grog).
  */
 public class Cell {
-    public final int x;
-    public final int y;
-    public final Ingredient ingredient;
+    public int y;
+    public int x;
+    public Ingredient ingredient;
 
-    public Cell(int x, int y, Ingredient ingredient) {
-        this.x = x;
+    public Cell(int y, int x, Ingredient ingredient) {
         this.y = y;
+        this.x = x;
         this.ingredient = ingredient;
     }
 
     @Override
     public String toString() {
         return ingredient.toString();
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof Cell)) return false;
+        Cell cell = (Cell) o;
+        return x == cell.x &&
+                y == cell.y &&
+                ingredient == cell.ingredient;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(x, y, ingredient);
+    }
+
+    public int getX() {
+        return x;
+    }
+
+    public int getY() {
+        return y;
+    }
 }

src/main/java/com/google/hashcode/entity/Pizza.java

@@ -1,8 +1,9 @@
 package com.google.hashcode.entity;
 
-import com.google.hashcode.utils.IoUtils;
-
 import java.io.File;
+import java.util.Comparator;
+import java.util.List;
+import java.util.Optional;
 
 /**
  * Represents an immutable pizza
@@ -12,10 +13,10 @@
 public class Pizza {
 
     private final File input;
-    private final Cell[][] cells;
+    private final List<Cell> cells;
     private final SliceInstruction sliceInstruction;
 
-    public Pizza(File input, Cell[][] cells, SliceInstruction sliceInstruction) {
+    public Pizza(File input, List<Cell> cells, SliceInstruction sliceInstruction) {
         this.input = input;
         this.cells = cells;
         this.sliceInstruction = sliceInstruction;
@@ -25,20 +26,70 @@ public File getInput() {
         return input;
     }
 
-    public Cell[][] getCells() {
+    public List<Cell> getCells() {
         return cells;
     }
 
+    /**
+     * Coordinates are like in a 2D array
+     *
+     * @param y - row number, 0..max row number
+     * @param x - column number,0..max column number
+     * @return a pizza cell with specified coordinated
+     */
+    public Optional<Cell> getCell(int y, int x) {
+        return cells.stream().filter(cell -> cell.x == x && cell.y == y).findFirst();
+    }
+
+    public SliceInstruction getSliceInstruction() {
+        return sliceInstruction;
+    }
 
     @Override
     public String toString() {
-        return input.toString() +
-                "\n" + IoUtils.convertToHumanReadableTable(cells) +
-                "\n" + sliceInstruction.toString();
+        return input.toString()
+                + ("\n" + sliceInstruction.toString()
+                + "\n" + outputCellsArray()).trim();
     }
 
+    /**
+     * Indicates does this pizza contains each slice's cell
+     *
+     * @param slice given slice
+     * @return true if the pizza contains the slice
+     */
+    public boolean containsCells(Slice slice) {
+        return slice.cells.stream().allMatch(this.cells::contains);
+    }
 
-    public SliceInstruction getSliceInstruction() {
-        return sliceInstruction;
+    private String outputCellsArray() {
+        if (!cells.isEmpty()) {
+            StringBuilder stringBuilder = new StringBuilder();
+            int columnsCount = cells.stream().max(Comparator.comparingInt(Cell::getX)).get().getX();
+            int rowsCount = cells.stream().max(Comparator.comparingInt(Cell::getY)).get().getY();
+            //output columns coordinates
+            stringBuilder.append(" ");
+            for (int column = 0; column < columnsCount + 1; column++) {
+                stringBuilder.append(" ").append(column);
+            }
+            stringBuilder.append("\n");
+            for (int row = 0; row < rowsCount + 1; row++) {
+                //output rows coordinates
+                stringBuilder.append(row).append(" ");
+                for (int column = 0; column < columnsCount + 1; column++) {
+                    if (this.getCell(row, column).isPresent()) {
+                        stringBuilder.append(this.getCell(row, column).get().toString()).append(" ");
+                    } else {
+                        stringBuilder.append(" ").append(" ");
+                    }
+                }
+                stringBuilder.append("\n");
+            }
+            return stringBuilder.toString();
+        } else {
+            return "";
+        }
     }
+
+
 }