Merge remote-tracking branch 'origin/master'

# Conflicts:
#	.tool-versions
#	README.md

.tool-versions

@@ -1,3 +1,4 @@
 java temurin-21.0.3+9.0.LTS
 maven 3.9.6
+pyton 3.13.3
 ghc 9.8.4

README.md

@@ -1,8 +1,10 @@
 # Field Kit
 
-* a collection of easy-to-use tools that cover common use cases.
+This repo has two purposes:
-* also serves as workspace for exercises.
+
-    * those results should be migrated to their respective `about-foo` once some knowledge is consolidated.
+- Serve as a collection of easy-to-use tools that cover common use cases.
+- Be a workspace for exercises.
+    - those results should be migrated to their respective `about-foo` once some knowledge is consolidated.
 
 ## List of Use Cases
 
@@ -19,10 +21,11 @@
 
 ## Setup
 
-* WIN
+#### Python
-    * pyenv win
+
+* in IDEA, make sure to set SDK proj settings / module
 
 
-### Haskell Kit
+#### Haskell
 
 asdf plugin add ghc

hackerrank/sql/scratch.sql

@@ -0,0 +1,11 @@
+SELECT *
+FROM CITY
+WHERE COUNTRYCODE = 'USA'
+  AND POPULATION > 100000;
+
+
+SELECT CITY, STATE
+FROM STATION;
+
+
+SELECT DISTINCT CITY FROM STATION WHERE ID % 2 = 0;

java-kit/src/main/java/com/olexyn/field/kit/hacker/rank/problems/CatMouseABC.java

@@ -0,0 +1,25 @@
+package com.olexyn.field.kit.hacker.rank.problems;
+
+public class CatMouseABC {
+
+
+    public static void main(String[] args) {
+
+    }
+
+
+
+    static String catAndMouse(int x, int y, int z) {
+
+        int dx = Math.abs(x - z);
+        int dy = Math.abs(y - z);
+        if (dx == dy) {
+            return "Mouse C";
+        }
+        if (dx < dy) {
+            return "Cat A";
+        }
+        return "Cat B";
+    }
+
+}

java-kit/src/main/java/com/olexyn/field/kit/hacker/rank/problems/KeysBudget.java

@@ -0,0 +1,30 @@
+package com.olexyn.field.kit.hacker.rank.problems;
+
+public class KeysBudget {
+
+
+    public static void main(String[] args) {
+
+    }
+
+
+
+    static int getMoneySpent(int[] keyboards, int[] drives, int b) {
+        int max = -1;
+
+        for (int k : keyboards) {
+            for (int d : drives) {
+                int sum = k + d;
+                if (sum <= b && sum > max) {
+                    max = sum;
+                }
+                if (max == b) {
+                    return max;
+                }
+            }
+        }
+        return max;
+
+    }
+
+}

java-kit/src/main/java/com/olexyn/field/kit/hacker/rank/problems/Valleys.java

@@ -5,26 +5,27 @@ public class Valleys {
 
     public static void main(String[] args) {
         countingValleys(
-            8,
+            12,
-            "UDDDUDUU"
+            "DDUUDDUDUUUD"
         );
-        System.out.println("hi");
     }
 
 
 
     public static int countingValleys(int steps, String path) {
         // Write your code here
+        int prevLevel = 0;
         int level = 0;
         int valleys = 0;
-        String[] paths = path.split("");
+        for (String s : path.split("")) {
-        for (int i = 0; i < paths.length; i++) {
+            if (s.equals("U")) {
-            if (paths[i].equals("U")) {
+                prevLevel = level;
                 level++;
             } else {
+                prevLevel = level;
                 level--;
             }
-            if (i != 0 && level == 0 && paths[i - 1].equals("U")) {
+            if (prevLevel == -1 && level == 0 && s.equals("U")) {
                 valleys++;
             }
         }

java-kit/src/main/java/org/example/App.java

@@ -1,13 +0,0 @@
-package org.example;
-
-/**
- * Hello world!
- *
- */
-public class App 
-{
-    public static void main( String[] args )
-    {
-        System.out.println( "Hello World!" );
-    }
-}

pom.xml

@@ -6,6 +6,7 @@
     <packaging>pom</packaging>
     <modules>
         <module>java-kit</module>
+        <module>py-kit</module>
     </modules>
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

py-kit/app-basic.py

@@ -0,0 +1,32 @@
+def do_foo():
+    if n % 2 == 1:
+        print('Weird')
+        return
+    if 1 < n < 6:
+        print('Not Weird')
+    if 5 < n < 12:
+        print('Weird')
+    if 19 < n:
+        print('Not Weird')
+
+
+def log_base_10(n):
+    if n == 0:
+        return float('-inf')  # Logarithm of 0 is undefined
+    count = 0
+    while n >= 1:
+        n /= 10
+        count += 1
+    return count
+
+
+if __name__ == '__main__':
+    n = 102
+    out = 0
+    for i in range(1, n + 1):
+        power = (i // 10 + 1)
+
+        # print(i, i / 10, log_base_10(i), pow(10, log_base_10(i) - 1), pow(10, power))
+        out = out * pow(10, log_base_10(i)) + i
+
+    print(out)

py-kit/pom.xml

@@ -0,0 +1,11 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>com.olexyn</groupId>
+        <artifactId>field-kit</artifactId>
+        <version>1.0</version>
+    </parent>
+    <artifactId>py-kit</artifactId>
+    <packaging>jar</packaging>
+    <!-- dummy -->
+</project>

py-kit/print-with-log.py

@@ -0,0 +1,20 @@
+def log_base_10(n):
+    if n == 0:
+        return float('-inf')  # Logarithm of 0 is undefined
+    count = 0
+    while n >= 1:
+        n /= 10
+        count += 1
+    return count
+
+
+if __name__ == '__main__':
+    n = 102
+    out = 0
+    for i in range(1, n + 1):
+        power = (i // 10 + 1)
+
+        # print(i, i / 10, log_base_10(i), pow(10, log_base_10(i) - 1), pow(10, power))
+        out = out * pow(10, log_base_10(i)) + i
+
+    print(out)