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Day5.java
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Day5.java
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import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.function.Function;
import java.util.stream.Collector;
import java.util.stream.Collectors;
import java.util.stream.IntStream;
/*
First stack
[D] [N] [F]
[H] [F] [L] [J] [H]
[R] [H] [F] [V] [G] [H]
[Z] [Q] [Z] [W] [L] [J] [B]
[S] [W] [H] [B] [H] [D] [C] [M]
[P] [R] [S] [G] [J] [J] [W] [Z] [V]
[W] [B] [V] [F] [G] [T] [T] [T] [P]
[Q] [V] [C] [H] [P] [Q] [Z] [D] [W]
1 2 3 4 5 6 7 8 9
Example input: move 1 from 3 to 9
*/
public class Day5 {
List<String> l1 = new ArrayList<>();
private static String readFile(Function<BufferedReader, String> runner) throws FileNotFoundException, IOException{
try(BufferedReader br = new BufferedReader(new FileReader("input_5.txt"))) {
return runner.apply(br);
}
}
public static String firstQuestion() throws FileNotFoundException, IOException{
List<String> l1 = new ArrayList<>(Arrays.asList("Q", "W", "P", "S", "Z", "R", "H", "D"));
List<String> l2 = new ArrayList<>(Arrays.asList("V", "B", "R", "W", "Q", "H", "F"));
List<String> l3 = new ArrayList<>(Arrays.asList("C", "V", "S", "H"));
List<String> l4 = new ArrayList<>(Arrays.asList("G", "F", "H"));
List<String> l5 = new ArrayList<>(Arrays.asList("P", "G", "J", "B", "Z"));
List<String> l6 = new ArrayList<>(Arrays.asList("Q", "T", "J", "H", "W", "F", "L"));
List<String> l7 = new ArrayList<>(Arrays.asList("Z", "T", "W", "D", "L", "V", "J", "N"));
List<String> l8 = new ArrayList<>(Arrays.asList("D", "T", "Z", "C", "J", "G", "H", "F"));
List<String> l9 = new ArrayList<>(Arrays.asList("W", "P", "V", "M", "B", "H"));
Map<Integer, List<String>> map = new LinkedHashMap<Integer, List<String>>() {{
put(1, l1);
put(2, l2);
put(3, l3);
put(4, l4);
put(5, l5);
put(6, l6);
put(7, l7);
put(8, l8);
put(9, l9);
}};
Function<BufferedReader, String> test = (br) ->{
String line;
try {
line = br.readLine();
while (line != null) {
String[] parts = line.split(" ");
int num = Integer.parseInt(parts[1]);
int from = Integer.parseInt(parts[3]);
int to = Integer.parseInt(parts[5]);
for (int i = 0; i < num; i++) {
List<String> fromList = map.get(from);
List<String> toList = map.get(to);
toList.add(fromList.remove(fromList.size() -1));
}
line = br.readLine();
}
return map.values()
.stream()
.map(l -> l.get(l.size()-1))
.collect(Collectors.joining(""));
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
};
return readFile(test);
}
public static String secondQuestion() throws FileNotFoundException, IOException{
List<String> l1 = new ArrayList<>(Arrays.asList("Q", "W", "P", "S", "Z", "R", "H", "D"));
List<String> l2 = new ArrayList<>(Arrays.asList("V", "B", "R", "W", "Q", "H", "F"));
List<String> l3 = new ArrayList<>(Arrays.asList("C", "V", "S", "H"));
List<String> l4 = new ArrayList<>(Arrays.asList("G", "F", "H"));
List<String> l5 = new ArrayList<>(Arrays.asList("P", "G", "J", "B", "Z"));
List<String> l6 = new ArrayList<>(Arrays.asList("Q", "T", "J", "H", "W", "F", "L"));
List<String> l7 = new ArrayList<>(Arrays.asList("Z", "T", "W", "D", "L", "V", "J", "N"));
List<String> l8 = new ArrayList<>(Arrays.asList("D", "T", "Z", "C", "J", "G", "H", "F"));
List<String> l9 = new ArrayList<>(Arrays.asList("W", "P", "V", "M", "B", "H"));
Map<Integer, List<String>> map = new LinkedHashMap<Integer, List<String>>() {{
put(1, l1);
put(2, l2);
put(3, l3);
put(4, l4);
put(5, l5);
put(6, l6);
put(7, l7);
put(8, l8);
put(9, l9);
}};
Function<BufferedReader, String> test = (br) ->{
String line;
try {
line = br.readLine();
while (line != null) {
String[] parts = line.split(" ");
int num = Integer.parseInt(parts[1]);
int from = Integer.parseInt(parts[3]);
int to = Integer.parseInt(parts[5]);
List<String> fromList = map.get(from);
List<String> toList = map.get(to);
List<String> sub = fromList.subList(fromList.size() - num, fromList.size());
toList.addAll(sub);
sub.clear();
line = br.readLine();
}
return map.values()
.stream()
.map(l -> l.get(l.size()-1))
.collect(Collectors.joining(""));
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
};
return readFile(test);
}
public static void main(String[] args) throws IOException {
System.out.println("Score: " + firstQuestion());
System.out.println("Score: " + secondQuestion());
}
}