2020-12-05 Update: Added "Age Range Compatibility Equation" and "What is your country's currency symbol?"

Author: fartem

README.md

@@ -15,6 +15,7 @@ Profile on Codewars: [fartem](https://www.codewars.com/users/fartem).
 | Name | Link to Codewars | Link to solution |
 | --- | --- | --- |
 | Abbreviate a Two Word Name | [Link](https://www.codewars.com/kata/57eadb7ecd143f4c9c0000a3) | [Link](./src/main/java/com/smlnskgmail/jaman/codewarsjava/kyu8/AbbreviateATwoWordName.java) |
+| Age Range Compatibility Equation | [Link](https://www.codewars.com/kata/5803956ddb07c5c74200144e) | [Link](./src/main/java/com/smlnskgmail/jaman/codewarsjava/kyu8/AgeRangeCompatibilityEquation.java) |
 | altERnaTIng cAsE <=> ALTerNAtiNG CaSe | [Link](https://www.codewars.com/kata/56efc695740d30f963000557) | [Link](./src/main/java/com/smlnskgmail/jaman/codewarsjava/kyu8/AltERnaTIngcAsEALTerNAtiNGCaSe.java) |
 | A Needle in the Haystack | [Link](https://www.codewars.com/kata/56676e8fabd2d1ff3000000c) | [Link](./src/main/java/com/smlnskgmail/jaman/codewarsjava/kyu8/ANeedleInTheHaystack.java) |
 | Array plus array | [Link](https://www.codewars.com/kata/5a2be17aee1aaefe2a000151) | [Link](./src/main/java/com/smlnskgmail/jaman/codewarsjava/kyu8/ArrayPlusArray.java) |
@@ -177,6 +178,7 @@ Profile on Codewars: [fartem](https://www.codewars.com/users/fartem).
 | Valid Braces | [Link](https://www.codewars.com/kata/5277c8a221e209d3f6000b56) | [Link](./src/main/java/com/smlnskgmail/jaman/codewarsjava/kyu6/ValidBraces.java) |
 | Valid Phone Number | [Link](https://www.codewars.com/kata/525f47c79f2f25a4db000025) | [Link](./src/main/java/com/smlnskgmail/jaman/codewarsjava/kyu6/ValidPhoneNumber.java) |
 | Versions manager | [Link](https://www.codewars.com/kata/5bc7bb444be9774f100000c3) | [Link](./src/main/java/com/smlnskgmail/jaman/codewarsjava/kyu6/VersionsManager.java) |
+| What is your country's currency symbol? | [Link](https://www.codewars.com/kata/5957996dbe7b4fef30000061) | [Link](./src/main/java/com/smlnskgmail/jaman/codewarsjava/kyu6/WhatIsYourCountrysCurrencySymbol.java) |
 | Who likes it? | [Link](https://www.codewars.com/kata/5266876b8f4bf2da9b000362) | [Link](./src/main/java/com/smlnskgmail/jaman/codewarsjava/kyu6/WhoLikesIt.java) |
 | Who won the election | [Link](https://www.codewars.com/kata/554910d77a3582bbe300009c) | [Link](./src/main/java/com/smlnskgmail/jaman/codewarsjava/kyu6/WhoWonTheElection.java) |
 | World Bits War | [Link](https://www.codewars.com/kata/58865bfb41e04464240000b0) | [Link](./src/main/java/com/smlnskgmail/jaman/codewarsjava/kyu6/WorldBitsWar.java) |

src/main/java/com/smlnskgmail/jaman/codewarsjava/kyu6/WhatIsYourCountrysCurrencySymbol.java

@@ -0,0 +1,28 @@
+package com.smlnskgmail.jaman.codewarsjava.kyu6;
+
+import java.util.Currency;
+import java.util.HashMap;
+import java.util.Locale;
+import java.util.Map;
+
+public class WhatIsYourCountrysCurrencySymbol {
+
+    private final String input;
+
+    public WhatIsYourCountrysCurrencySymbol(String input) {
+        this.input = input;
+    }
+
+    public String solution() {
+        Map<String, Locale> countries = new HashMap<>();
+        for (String c : Locale.getISOCountries()) {
+            Locale locale = new Locale("", c);
+            countries.put(locale.getDisplayCountry(), locale);
+        }
+        if (countries.get(input) == null) {
+            throw new IllegalArgumentException();
+        }
+        return Currency.getInstance(countries.get(input)).getCurrencyCode();
+    }
+
+}

src/main/java/com/smlnskgmail/jaman/codewarsjava/kyu8/AgeRangeCompatibilityEquation.java

@@ -0,0 +1,27 @@
+package com.smlnskgmail.jaman.codewarsjava.kyu8;
+
+// https://www.codewars.com/kata/5803956ddb07c5c74200144e
+public class AgeRangeCompatibilityEquation {
+
+    private final int input;
+
+    public AgeRangeCompatibilityEquation(int input) {
+        this.input = input;
+    }
+
+    public String solution() {
+        if (input < 14) {
+            return String.format(
+                    "%d-%d",
+                    (int) (input - 0.10 * input),
+                    (int) (input + 0.10 * input)
+            );
+        }
+        return String.format(
+                "%s-%s",
+                input / 2 + 7,
+                (input - 7) * 2
+        );
+    }
+
+}

src/test/java/com/smlnskgmail/jaman/codewarsjava/kyu6/WhatIsYourCountrysCurrencySymbolTest.java

@@ -0,0 +1,44 @@
+package com.smlnskgmail.jaman.codewarsjava.kyu6;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+public class WhatIsYourCountrysCurrencySymbolTest {
+
+    @Test
+    public void basicTest() {
+        assertEquals(
+                "RUB",
+                new WhatIsYourCountrysCurrencySymbol(
+                        "Russia"
+                ).solution()
+        );
+        assertEquals(
+                "EUR",
+                new WhatIsYourCountrysCurrencySymbol(
+                        "France"
+                ).solution()
+        );
+        assertEquals(
+                "EUR",
+                new WhatIsYourCountrysCurrencySymbol(
+                        "Germany"
+                ).solution()
+        );
+        assertEquals(
+                "CNY",
+                new WhatIsYourCountrysCurrencySymbol(
+                        "China"
+                ).solution()
+        );
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void testWrongCountry() throws Exception {
+        String symbol = new WhatIsYourCountrysCurrencySymbol(
+                "SomeUnknownCountry"
+        ).solution();
+    }
+
+}

src/test/java/com/smlnskgmail/jaman/codewarsjava/kyu8/AgeRangeCompatibilityEquationTest.java

@@ -0,0 +1,33 @@
+package com.smlnskgmail.jaman.codewarsjava.kyu8;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+public class AgeRangeCompatibilityEquationTest {
+
+    @Test
+    public void exampleTests() {
+        assertEquals(
+                "15-20",
+                new AgeRangeCompatibilityEquation(17).solution()
+        );
+        assertEquals(
+                "27-66",
+                new AgeRangeCompatibilityEquation(40).solution()
+        );
+        assertEquals(
+                "14-16",
+                new AgeRangeCompatibilityEquation(15).solution()
+        );
+        assertEquals(
+                "24-56",
+                new AgeRangeCompatibilityEquation(35).solution()
+        );
+        assertEquals(
+                "9-11",
+                new AgeRangeCompatibilityEquation(10).solution()
+        );
+    }
+
+}