add cp21 with some example problems

Author: chistopher

.gitignore

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+# Competitive Programming specific part
+/*/*/*/build/
+/*/*/notes.pdf
+/*/*/contest.pdf
+/login.toml
+/timefactor
+__pycache__/
+
+# clion specific part
+.idea/
+cmake-build-*
+CMakeLists.txt
+

.gitmodules

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+[submodule "tools"]
+	path = tools
+	url = [email protected]:compprog-lecture-tools/problem-tools.git

README.md

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+
+In this repo we collect problems build by students.
+
+Please open a pull request so we can give you feedback.
+
+Documentation regarding problem building can be found in the problem-tools repository.

cp21/fun-contest/Makefile

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+../../tools/make/ContestMakefile

cp21/fun-contest/chocolate/.template

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+../../templates/description/template

cp21/fun-contest/chocolate/Makefile

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+../../../tools/make/Makefile

cp21/fun-contest/chocolate/domjudge-problem.ini

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+timelimit=1

cp21/fun-contest/chocolate/executables/generator.py

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+from pathlib import Path
+import random as r
+
+TESTCASES = [
+    ('sample1', '1 1', 'Sample 1x1'),
+    ('sample2', '2 1', 'Sample 2x1'),
+    ('sample3', '2 2', 'Sample 1x2'),
+    ('25x25', '25 25', 'Hard testcase')
+]
+
+for name, in_data, description in TESTCASES:
+    Path(name + '.in').write_text(in_data + '\n')
+    Path(name + '.desc').write_text(description + '\n')
+
+for i in range(1,21):
+    Path('random' + str(i) + '.in').write_text(str(r.randint(100, 10000)) + ' ' + str(r.randint(100, 10000)) + '\n')
+    Path('random' + str(i) + '.desc').write_text('random testcase ' + str(i) + '\n')
+

cp21/fun-contest/chocolate/executables/solution-david.cpp

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+#include <unistd.h>
+
+using namespace std;
+
+int main() {
+    char buf[14];
+
+    int w = 0;
+    int h = 0;
+    read(0, buf, 14);
+    auto* ptr = buf;
+    while (*ptr != ' ') {
+        w *= 10;
+        w += *ptr++ - '0';
+    }
+    ++ptr;
+    while (*ptr != '\n') {
+        h *= 10;
+        h += *ptr++ - '0';
+    }
+    
+    auto result = w * h - 1;
+    ptr = buf + 13;
+    *ptr-- = '\n';
+    if (result == 0) {
+        *ptr-- = '0';
+    } else {
+        while (result > 0) {
+            *ptr-- = result % 10 + '0';
+            result /= 10;
+        }
+    }
+
+    write(1, ptr + 1, buf + 13 - ptr - 1);
+    return 0;
+}

cp21/fun-contest/chocolate/executables/solution-philipp.py

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+w, h = map(int, input().split())
+
+print(w*h-1)

cp21/fun-contest/chocolate/executables/solution.py

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+#!/usr/bin/python3
+
+print([w*h-1 for w, h in [map(int, input().split())]][0])
+