feat: kata/c-is-for-codewars (#736)

* docs: kata description

* docs: sync progress

* feat: kata/c-is-for-codewars

---------

Co-authored-by: ParanoidUser <5120290+ParanoidUser@users.noreply.github.com>

docs/README.md

@@ -25,7 +25,7 @@ slug.
 
 | [1 kyu](/kata/1-kyu/index.md) | [2 kyu](/kata/2-kyu/index.md) | [3 kyu](/kata/3-kyu/index.md) | [4 kyu](/kata/4-kyu/index.md) | [5 kyu](/kata/5-kyu/index.md) | [6 kyu](/kata/6-kyu/index.md) | [7 kyu](/kata/7-kyu/index.md) | [8 kyu](/kata/8-kyu/index.md) | [beta](/kata/beta/index.md) | [retired](/kata/retired/index.md) |
 |:-----------------------------:|:-----------------------------:|:-----------------------------:|:-----------------------------:|:-----------------------------:|:-----------------------------:|:-----------------------------:|:-----------------------------:|:---------------------------:|:---------------------------------:|
-| 0 | 1 | 2 | 26 | 48 | 440 | 604 | 227 | 56 | 82 |
+| 0 | 1 | 2 | 26 | 48 | 440 | 605 | 227 | 56 | 82 |
 
 **Note:** The source code is written in Java 17 and may use language features that are incompatible
 with Java 8, 11.

kata/7-kyu/c-is-for-codewars/README.md

@@ -0,0 +1,37 @@
+# [C is for Codewars](https://www.codewars.com/kata/c-is-for-codewars "https://www.codewars.com/kata/675dc1d3830826975c58a09d")
+
+#### Task:
+
+Build a string representing a capital letter C of a given size out of 'C' characters.
+
+#### Examples:
+
+`generate_C(1)` should return this string:
+
+```
+CCCCC
+C
+C
+C
+CCCCC
+```
+
+`generate_C(2)` should be
+
+```
+CCCCCCCCCC
+CCCCCCCCCC
+CC
+CC
+CC
+CC
+CC
+CC
+CCCCCCCCCC
+CCCCCCCCCC
+```
+
+and so on. The string returned by `generate_C(size)` should have `5*size` lines, following the format above. <code>size</code> is a positive
+integer <code>&le; 2000.</code>
+
+Note that extra spaces after the C's in any line are incorrect. And the last line should not terminate with "\n".

kata/7-kyu/c-is-for-codewars/main/GenerateC.java

@@ -0,0 +1,8 @@
+import static java.util.stream.Collectors.joining;
+import static java.util.stream.IntStream.range;
+
+interface GenerateC {
+  static String generateC(int size) {
+    return range(0, 5 * size).mapToObj(r -> "C".repeat(size * (r < size || r > 4 * size - 1 ? 5 : 1))).collect(joining("\n"));
+  }
+}

kata/7-kyu/c-is-for-codewars/test/SolutionTest.java

@@ -0,0 +1,69 @@
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.jupiter.api.Test;
+
+class SolutionTest {
+  @Test
+  void sample() {
+    assertEquals("""
+        CCCCC
+        C
+        C
+        C
+        CCCCC""", GenerateC.generateC(1));
+
+    assertEquals("""
+        CCCCCCCCCC
+        CCCCCCCCCC
+        CC
+        CC
+        CC
+        CC
+        CC
+        CC
+        CCCCCCCCCC
+        CCCCCCCCCC""", GenerateC.generateC(2)
+    );
+
+    assertEquals("""
+        CCCCCCCCCCCCCCC
+        CCCCCCCCCCCCCCC
+        CCCCCCCCCCCCCCC
+        CCC
+        CCC
+        CCC
+        CCC
+        CCC
+        CCC
+        CCC
+        CCC
+        CCC
+        CCCCCCCCCCCCCCC
+        CCCCCCCCCCCCCCC
+        CCCCCCCCCCCCCCC""", GenerateC.generateC(3)
+    );
+
+    assertEquals("""
+        CCCCCCCCCCCCCCCCCCCC
+        CCCCCCCCCCCCCCCCCCCC
+        CCCCCCCCCCCCCCCCCCCC
+        CCCCCCCCCCCCCCCCCCCC
+        CCCC
+        CCCC
+        CCCC
+        CCCC
+        CCCC
+        CCCC
+        CCCC
+        CCCC
+        CCCC
+        CCCC
+        CCCC
+        CCCC
+        CCCCCCCCCCCCCCCCCCCC
+        CCCCCCCCCCCCCCCCCCCC
+        CCCCCCCCCCCCCCCCCCCC
+        CCCCCCCCCCCCCCCCCCCC""", GenerateC.generateC(4)
+    );
+  }
+}

kata/7-kyu/index.md

@@ -71,6 +71,7 @@
 - [Bumps in the Road](bumps-in-the-road)
 - [Bus mastering - Who is the most prioritary?](bus-mastering-who-is-the-most-prioritary)
 # C
+- [C is for Codewars](c-is-for-codewars)
 - [C.Wars](cwars)
 - [Caffeine Script](caffeine-script)
 - [Calculate mean and concatenate string](calculate-mean-and-concatenate-string)