feat: add codeforces solution reorganization script

Author: lzwjava

codeforces.py

@@ -0,0 +1,69 @@
+import shutil
+from pathlib import Path
+
+def add_package_declaration(java_file, package):
+    """Add package declaration to the top of a Java file if not already present."""
+    with open(java_file, 'r', encoding='utf-8') as f:
+        content = f.read()
+
+    if not content.strip().startswith('package '):
+        new_content = f'package {package};\n\n{content}'
+        with open(java_file, 'w', encoding='utf-8') as f:
+            f.write(new_content)
+        print(f'Added package declaration to {java_file}')
+    else:
+        print(f'Package declaration already exists in {java_file}')
+
+def reorganize_codeforces():
+    # Define root paths
+    root = Path.cwd()
+    src_java = root / 'src' / 'main' / 'java' / 'com' / 'algorithm' / 'solutions' / 'codeforces'
+    src_resources = root / 'src' / 'main' / 'resources' / 'codeforces'
+    codeforces_root = root / 'codeforces'
+
+    # Create codeforces directory structure
+    src_java.mkdir(parents=True, exist_ok=True)
+    src_resources.mkdir(exist_ok=True)
+    print('Created codeforces Maven directory structure')
+
+    if codeforces_root.exists():
+        for problem_dir in codeforces_root.iterdir():
+            if problem_dir.is_dir():
+                problem = problem_dir.name
+                target_java_dir = src_java / f'p{problem}'
+                target_resource_dir = src_resources / f'p{problem}'
+                target_java_dir.mkdir(exist_ok=True)
+                target_resource_dir.mkdir(exist_ok=True)
+
+                # Handle all *.java files in src directory
+                src_dir = problem_dir / 'src'
+                if src_dir.exists():
+                    for java_file in src_dir.glob('*.java'):
+                        target_java = target_java_dir / java_file.name
+                        shutil.move(str(java_file), str(target_java))
+                        print(f'Moved {java_file} to {target_java}')
+                        add_package_declaration(target_java, f'com.algorithm.solutions.codeforces.p{problem}')
+                else:
+                    print(f'No src directory found in {problem_dir}')
+
+                # Handle all *.in files in problem directory
+                for input_file in problem_dir.glob('*.in'):
+                    target_input = target_resource_dir / input_file.name
+                    shutil.move(str(input_file), str(target_input))
+                    print(f'Moved {input_file} to {target_input}')
+
+                # Clean up src directory if empty
+                if src_dir.exists() and not any(src_dir.iterdir()):
+                    src_dir.rmdir()
+                    print(f'Removed empty directory {src_dir}')
+
+                # Clean up problem directory if empty
+                if not any(problem_dir.iterdir()):
+                    problem_dir.rmdir()
+                    print(f'Removed empty directory {problem_dir}')
+    else:
+        print('codeforces directory not found, skipping')
+
+if __name__ == '__main__':
+    reorganize_codeforces()
+    print('Codeforces reorganization complete.')