add gcd and prime factors

meson.build

@@ -0,0 +1,37 @@
+project(
+  meson.current_source_dir().split('/').get(-1), 
+  'cpp', 
+  version : run_command('git', 'rev-parse',  '--short', 'HEAD', check: false).stdout().strip(),
+  default_options : [
+    'warning_level=1',
+    'optimization=3',
+    'cpp_std=c++20',
+])
+
+add_project_arguments (
+  '-Wpedantic',
+  '-Wno-shadow', 
+  '-Wno-unused-but-set-variable',
+  '-Wno-comment',
+  '-Wno-unused-parameter',
+  '-Wno-unused-value',
+  '-Wno-missing-field-initializers',
+  '-Wno-narrowing',
+  '-Wno-deprecated-enum-enum-conversion',
+  '-Wno-volatile',
+  '-Wno-format-security',
+  '-Wno-switch',
+  '-Wno-ignored-attributes',
+  '-Wno-unused-variable',
+  '-Wno-deprecated-enum-enum-conversion',
+  language: 'cpp'
+)
+
+args = []
+inc = []
+deps = [
+  subproject('hack').get_variable('hack_dep')
+]
+
+subdir('src')
+subdir('bin')