From 7a005675028960c4804f6106d10ceb9d9ffe4f10 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Zacharias=20Zell=C3=A9n?= <zacharias@4zellen.se>
Date: Fri, 17 Apr 2026 18:29:07 +0200
Subject: [PATCH] NCPC26 Practise 2

---
 .idea/gradle.xml                              |   1 +
 .../java/com/kattis/ncpc25/log/rider/A.java   |  40 ------
 .../java/com/kattis/ncpc25/log/rider/C.java   | 118 ------------------
 .../java/com/kattis/ncpc25/log/rider/D.java   |  61 ---------
 .../java/com/kattis/ncpc25/log/rider/G.java   |  18 ---
 .../java/com/kattis/ncpc25/log/rider/J.java   |  67 ----------
 .../java/com/kattis/ncpc25/log/rider/K.java   |  41 ------
 .../java/com/kattis/ncpc26/p2/pending/D.java  |  68 ++++++++++
 .../java/com/kattis/ncpc26/p2/pending/E.java  |  44 +++++++
 9 files changed, 113 insertions(+), 345 deletions(-)
 delete mode 100644 src/main/java/com/kattis/ncpc25/log/rider/A.java
 delete mode 100644 src/main/java/com/kattis/ncpc25/log/rider/C.java
 delete mode 100644 src/main/java/com/kattis/ncpc25/log/rider/D.java
 delete mode 100644 src/main/java/com/kattis/ncpc25/log/rider/G.java
 delete mode 100644 src/main/java/com/kattis/ncpc25/log/rider/J.java
 delete mode 100644 src/main/java/com/kattis/ncpc25/log/rider/K.java
 create mode 100644 src/main/java/com/kattis/ncpc26/p2/pending/D.java
 create mode 100644 src/main/java/com/kattis/ncpc26/p2/pending/E.java

diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index 14746e7..2a65317 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="GradleMigrationSettings" migrationVersion="1" />
   <component name="GradleSettings">
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>
diff --git a/src/main/java/com/kattis/ncpc25/log/rider/A.java b/src/main/java/com/kattis/ncpc25/log/rider/A.java
deleted file mode 100644
index ec46b39..0000000
--- a/src/main/java/com/kattis/ncpc25/log/rider/A.java
+++ /dev/null
@@ -1,40 +0,0 @@
-package com.kattis.ncpc25.log.rider;
-
-import java.io.BufferedReader;
-import java.io.InputStreamReader;
-import java.util.Random;
-
-public class A {
-    public static void main(String[] args) throws Exception {
-        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
-        int[] nums = getComponents(Integer.parseInt(in.readLine()));
-        System.out.println(nums[0] + " " + nums[1]);
-    }
-
-    public static int[] getComponents(int input)
-    {
-        int num = new Random().nextInt(-999, 1000);
-        int num2 = 0;
-        if(num == 0)
-        {
-            num = new Random().nextInt(-999, 1000);
-        }
-        if(num < input)
-        {
-            num2 = input-num;
-        }
-        else if (input < 0 && input < num) {
-            num2 = input - num;
-        }
-        else if (num > input) {
-            num2 = input - num;
-        }
-        else{
-            num +=1;
-            num2 -= 1;
-        }
-        if(num >= 1000 || num <= -1000 || num2 >= 1000 || num2 <= -1000)
-            return getComponents(input);
-        return new int[]{num, num2};
-    }
-}
diff --git a/src/main/java/com/kattis/ncpc25/log/rider/C.java b/src/main/java/com/kattis/ncpc25/log/rider/C.java
deleted file mode 100644
index 9287929..0000000
--- a/src/main/java/com/kattis/ncpc25/log/rider/C.java
+++ /dev/null
@@ -1,118 +0,0 @@
-package com.kattis.ncpc25.log.rider;
-
-import java.io.BufferedReader;
-import java.io.InputStreamReader;
-import java.util.MissingFormatArgumentException;
-
-public class C {
-
-    public static final int MINUTES_IN_A_DAY = 1_440;
-
-    public static void main(String[] args) throws Exception{
-        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
-        String start = in.readLine();
-        String end = in.readLine();
-
-        String out = countTime(start, end);
-        System.out.println(out);
-    }
-
-    public static String countTime(String start, String end)
-    {
-        if(start.equalsIgnoreCase(end))
-        {
-            return "7 days";
-        }
-
-        int startTime = formatedTimeToMin(start);
-        int endTime = formatedTimeToMin(end);
-
-        if(endTime < startTime)
-        {
-            endTime += MINUTES_IN_A_DAY*7;
-        }
-
-        int totalTime = endTime-startTime;
-
-        int days = totalTime / MINUTES_IN_A_DAY;
-        int hours = (totalTime - (days * MINUTES_IN_A_DAY)) / 60;
-        int minutes = (totalTime - (days * MINUTES_IN_A_DAY) - (hours * 60));
-
-        int components = 0;
-        if(days > 0)
-        {
-            components += 1;
-        }
-        if(hours > 0)
-        {
-            components += 1;
-        }
-        if(minutes > 0)
-        {
-            components += 1;
-        }
-
-        StringBuilder out = new StringBuilder();
-        if(days > 0)
-        {
-            out.append(days).append(" day").append((days == 1?"":"s"));
-        }
-        if(hours > 0)
-        {
-            if(!out.isEmpty())
-            {
-                if(components == 2)
-                {
-                    out.append(" and ");
-                }
-                else {
-                    out.append(", ");
-                }
-            }
-            out.append(hours).append(" hour").append((hours == 1?"":"s"));
-        }
-        if(minutes > 0)
-        {
-            if(!out.isEmpty())
-            {
-                if(components == 2)
-                {
-                    out.append(" and ");
-                }
-                else {
-                    out.append(", ");
-                }
-            }
-            out.append(minutes).append(" minute").append((minutes == 1?"":"s"));
-        }
-
-        return out.toString();
-    }
-
-    public static int formatedTimeToMin(String formated)
-    {
-        String day, time;
-        day = formated.split(" ")[0];
-        time = formated.split(" ")[1];
-        int min = 0;
-
-        min += switch (day) {
-            case "Mon" -> MINUTES_IN_A_DAY;
-            case "Tue" -> MINUTES_IN_A_DAY*2;
-            case "Wed" -> MINUTES_IN_A_DAY*3;
-            case "Thu" -> MINUTES_IN_A_DAY*4;
-            case "Fri" -> MINUTES_IN_A_DAY*5;
-            case "Sat" -> MINUTES_IN_A_DAY*6;
-            case "Sun" -> MINUTES_IN_A_DAY*7;
-            default -> 0;
-        };
-
-        String hour = time.split(":")[0];
-        String minute = time.split(":")[1];
-
-        min += Integer.parseInt(minute);
-        min += Integer.parseInt(hour)*60;
-
-        return min;
-    }
-}
diff --git a/src/main/java/com/kattis/ncpc25/log/rider/D.java b/src/main/java/com/kattis/ncpc25/log/rider/D.java
deleted file mode 100644
index 6202c6a..0000000
--- a/src/main/java/com/kattis/ncpc25/log/rider/D.java
+++ /dev/null
@@ -1,61 +0,0 @@
-package com.kattis.ncpc25.log.rider;
-
-import java.awt.*;
-import java.io.BufferedReader;
-import java.io.InputStreamReader;
-import java.util.ArrayList;
-import java.util.Arrays;
-
-public class D {
-    public static void main(String[] args) throws Exception {
-        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
-        int count = Integer.parseInt(in.readLine());
-        Point[] points = new Point[count];
-        for(int i = 0; i < count; i++)
-        {
-            String line = in.readLine();
-            int n1 = Integer.parseInt(line.split(" ")[0]);
-            int n2 = Integer.parseInt(line.split(" ")[1]);
-            points[i] = new Point(n1, n2);
-        }
-
-        double length = getTotalLength(points);
-        System.out.println(length);
-    }
-
-    public static double getTotalLength(Point[] points)
-    {
-        points = sort(points);
-        double out = 0;
-        Point pLast = null;
-        for(Point p : points)
-        {
-            if(pLast == null)
-            {
-                pLast = p;
-                continue;
-            }
-            out += pLast.distance(p);
-        }
-        return out;
-    }
-
-    public static Point[] sort(Point[] in)
-    {
-        ArrayList<Point> out = new ArrayList<>();
-        ArrayList<Point> left = new ArrayList<>(Arrays.stream(in).toList());
-        Point p1, p2, p3;
-        if(!left.isEmpty()) p1 = left.removeFirst();
-        if(!left.isEmpty()) p2 = left.removeFirst();
-        if(!left.isEmpty()) p3 = left.removeFirst();
-
-        //if(p3 == null)
-        //{
-        //    out.put
-        //}
-
-        //if(p1.distance(p3))
-
-        return out.toArray(new Point[0]);
-    }
-}
diff --git a/src/main/java/com/kattis/ncpc25/log/rider/G.java b/src/main/java/com/kattis/ncpc25/log/rider/G.java
deleted file mode 100644
index 9c692c0..0000000
--- a/src/main/java/com/kattis/ncpc25/log/rider/G.java
+++ /dev/null
@@ -1,18 +0,0 @@
-package com.kattis.ncpc25.log.rider;
-
-import java.io.BufferedReader;
-import java.io.IOException;
-import java.io.InputStreamReader;
-import java.util.ArrayList;
-
-public class G {
-    public static void main(String[] args) throws IOException {
-        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
-        int n,m,k;
-        String line = in.readLine();
-        n = Integer.parseInt(line.split(" ")[0]);
-        m = Integer.parseInt(line.split(" ")[1]);
-        k = Integer.parseInt(line.split(" ")[2]);
-
-    }
-}
\ No newline at end of file
diff --git a/src/main/java/com/kattis/ncpc25/log/rider/J.java b/src/main/java/com/kattis/ncpc25/log/rider/J.java
deleted file mode 100644
index 189db3d..0000000
--- a/src/main/java/com/kattis/ncpc25/log/rider/J.java
+++ /dev/null
@@ -1,67 +0,0 @@
-package com.kattis.ncpc25.log.rider;
-
-import java.io.BufferedReader;
-import java.io.IOException;
-import java.io.InputStreamReader;
-import java.util.ArrayList;
-import java.util.concurrent.atomic.AtomicInteger;
-import java.util.concurrent.atomic.AtomicLong;
-
-public class J {
-    public static void main(String[] args) throws IOException {
-        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
-        String line = in.readLine();
-        long N = Long.parseLong(line.split(" ")[0]);
-        long E = Long.parseLong(line.split(" ")[1]);
-        String out = jump(N, E);
-        System.out.println(out);
-    }
-
-    public static String jump(long N, long E)
-    {
-        ArrayList<Integer> levels = new ArrayList<>();
-        int count = 0;
-        int diff = 0;
-        long time = 0;
-        boolean inf = false;
-        boolean first = true;
-        do
-        {
-            time += E;
-            if(time % N == 0 && !first)
-            {
-                E++;
-                if(count < 11){
-                    diff++;
-                    count++;
-                }
-            }
-            else
-            {
-                E--;
-                if(count < 11){
-                    diff--;
-                    count++;
-                }
-            }
-            if(count >= 10)
-            {
-                if(diff == 0)
-                {
-                    inf = true;
-                    break;
-                }
-            }
-            if(first) first = false;
-        }
-        while (E > 0);
-        if(inf)
-        {
-            return "infinity";
-        }
-        else
-        {
-            return time+"";
-        }
-    }
-}
diff --git a/src/main/java/com/kattis/ncpc25/log/rider/K.java b/src/main/java/com/kattis/ncpc25/log/rider/K.java
deleted file mode 100644
index 38b41fd..0000000
--- a/src/main/java/com/kattis/ncpc25/log/rider/K.java
+++ /dev/null
@@ -1,41 +0,0 @@
-package com.kattis.ncpc25.log.rider;
-
-import java.io.BufferedReader;
-import java.io.IOException;
-import java.io.InputStreamReader;
-
-public class K {
-    public static void main(String[] args) throws IOException {
-        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
-        int num = Integer.parseInt(in.readLine());
-        String[] signs = new String[num];
-        for(int i = 0; i < num; i++)
-        {
-            signs[i] = in.readLine();
-        }
-        int lastTop = 0;
-        int lastTopRound = 0;
-        for(String l : signs)
-        {
-            if(l.equalsIgnoreCase("/"))
-            {
-                System.out.println(lastTopRound);
-                continue;
-            }
-            int limit = Integer.parseInt(l);
-            if(limit > lastTopRound)
-            {
-                int tmp = (int)Math.ceil(limit/10.0)*10;
-                if(tmp == 90)
-                {
-                    lastTopRound = 100;
-                }
-                else if(tmp <= 160)
-                {
-                    lastTopRound = tmp;
-                }
-            }
-            System.out.println(limit);
-        }
-    }
-}
diff --git a/src/main/java/com/kattis/ncpc26/p2/pending/D.java b/src/main/java/com/kattis/ncpc26/p2/pending/D.java
new file mode 100644
index 0000000..9ff3041
--- /dev/null
+++ b/src/main/java/com/kattis/ncpc26/p2/pending/D.java
@@ -0,0 +1,68 @@
+package com.kattis.ncpc26.p2.pending;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+
+public class D {
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+
+        char[][] board = new char[8][8];
+
+        for(int i = 0; i < 8; i++)
+        {
+            board[i] = br.readLine().toCharArray();
+        }
+
+        int[][] dig = {
+                {1,1}, {-1,1}, {-1,1}, {-1,-1}
+        };
+
+        for(int bx = 0; bx < 8; bx++)
+        {
+            for(int by = 0; by < 8; by++)
+            {
+                if(board[bx][by] == '*')
+                {
+                    for(int i = 0; i < 8; i++)
+                    {
+                        if(i == bx) continue;
+                        if(board[i][by] == '*')
+                        {
+                            System.out.println("invalid");
+                            return;
+                        }
+                    }
+                    for(int i = 0; i < 8; i++)
+                    {
+                        if(i == by) continue;
+                        if(board[bx][i] == '*')
+                        {
+                            System.out.println("invalid");
+                            return;
+                        }
+                    }
+                }
+                for(int i = 0; i < 2; i++)
+                {
+                    int[] mod = dig[i];
+                    int x = mod[0];
+                    int y = mod[1];
+                    int base = (i==0?0:7);
+                    for(int j = 0; j < 8; j++)
+                    {
+                        if(base+x*j == bx && y*j == by) continue;
+                        if(board[base+x*j][y*j] == '*')
+                        {
+                            System.out.println("invalid");
+                            return;
+                        }
+                    }
+                }
+            }
+        }
+
+        System.out.println("valid");
+    }
+}
diff --git a/src/main/java/com/kattis/ncpc26/p2/pending/E.java b/src/main/java/com/kattis/ncpc26/p2/pending/E.java
new file mode 100644
index 0000000..6022df6
--- /dev/null
+++ b/src/main/java/com/kattis/ncpc26/p2/pending/E.java
@@ -0,0 +1,44 @@
+package com.kattis.ncpc26.p2.pending;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.ArrayList;
+import java.util.Locale;
+import java.util.Scanner;
+
+public class E {
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+
+        int n = Integer.parseInt(br.readLine());
+
+        int[] maxNumber = new int[n];
+        int[] minNumber = new int[n];
+
+        for(int i = 0; i < n; i++)
+        {
+            String hexNum = br.readLine().toUpperCase(Locale.ROOT);
+
+            if(hexNum.length() > 1 && (hexNum.startsWith("0") || hexNum.startsWith("D")))
+            {
+                hexNum = "d" + hexNum.substring(1);
+            }
+            {
+                minNumber[i] = Integer.parseInt(hexNum.replaceAll("B", "8").replaceAll("D", "0"), 16);
+                maxNumber[i] = Integer.parseInt(hexNum.replaceAll("8", "B").replaceAll("0", "D"), 16);
+            }
+        }
+
+        int maxOut = 0;
+        int minOut = 0;
+
+        for(int i = 0; i < n; i++) {
+            minOut += minNumber[i];
+            maxOut += maxNumber[i];
+        }
+
+        System.out.println(Integer.toHexString(maxOut).toUpperCase(Locale.ROOT));
+        System.out.println(Integer.toHexString(minOut).toUpperCase(Locale.ROOT));
+    }
+}