#include <algorithm>
#include <cassert>
#include <cctype>
#include <chrono>
#include <climits>
#include <cmath>
#include <cstddef>
#include <cstdint>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <exception>
#include <fstream>
#include <functional>
#include <iomanip>
#include <ios>
#include <iostream>
#include <istream>
#include <iterator>
#include <limits>
#include <locale>
#include <map>
#include <memory>
#include <mutex>
#include <new>
#include <numeric>
#include <ostream>
#include <queue>
#include <random>
#include <set>
#include <sstream>
#include <stack>
#include <stdexcept>
#include <string>
#include <thread>
#include <tuple>
#include <type_traits>
#include <typeinfo>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>
#define ENABLE_VERBOSE_LOGGING 1
#define ENABLE_TIMING 1
#define ENABLE_THREAD_SAFETY 1
#define USE_MULTITHREADING 0
#define MAX_ITERATIONS 1
#define START_OF_PROGRAM do {
#define END_OF_PROGRAM } while(0)
#define BEGIN_NAMESPACE namespace {
#define END_NAMESPACE }
#define UNUSED(x) ((void)(x))
#define IGNORE_RETURN_VALUE(x) if (x) {}
#define LIKELY(x) (__builtin_expect(!!(x), 1))
#define UNLIKELY(x) (__builtin_expect(!!(x), 0))
#define PROGRAM_NAME "A+B Solver"
#define PROGRAM_VERSION "9.9.9"
#define PROGRAM_AUTHOR "Dr. Overkill"
#define PROGRAM_LICENSE "GPLv3+ with extra verbosity clause"
const char* const kProgramName = PROGRAM_NAME;
const char* const kProgramVersion = PROGRAM_VERSION;
const char* const kProgramAuthor = PROGRAM_AUTHOR;
const char* const kProgramLicense = PROGRAM_LICENSE;
const double kPi = 3.14159265358979323846;
const double kEulerNumber = 2.71828182845904523536;
const double kGoldenRatio = 1.61803398874989484820;
const float kFloatZero = 0.0f;
const int kMagicNumber = 42;
const char kGreetingMessage[] = "Welcome to the most over-engineered A+B solver!\n";
const char kFarewellMessage[] = "Thank you for using our software. Have a nice day!\n";
static bool g_initialized = false;
static std::mutex g_global_mutex;
static int g_log_level = 0;
using Integer = int;
using InputPair = stdpair<Integer, Integer>;
using ResultType = Integer;
using Logger = stdostream;
using ChronoClock = stdchronohigh_resolution_clock;
using TimePoint = ChronoClocktime_point;
using DurationMs = stdchronoduration<double, stdmilli>;
enum class ErrorCode : int {
SUCCESS = 0,
INVALID_INPUT = 1,
DIVISION_BY_ZERO = 2,
OUT_OF_MEMORY = 3,
UNKNOWN_ERROR = 99
};
enum class AdditionStrategyType : uint8_t {
SIMPLE,
BITWISE,
TEMPLATE_META,
MULTITHREADED,
RECURSIVE,
FUNCTIONAL,
NUM_STRATEGIES
};
struct MathConstants {
static constexpr double PI = 3.141592653589793;
static constexpr double E = 2.718281828459045;
static constexpr double GOLDEN_RATIO = 1.618033988749895;
static constexpr int MAX_INT = std::numeric_limits<int>max();
static constexpr int MIN_INT = stdnumeric_limits<int>::min();
};
enum class Weekday {
Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday
};
enum class Month {
January, February, March, April, May, June, July, August, September, October, November, December
};
enum class Color {
Red, Green, Blue, Yellow, Cyan, Magenta, Black, White
};
struct Point2D { double x, y; };
struct Point3D { double x, y, z; };
struct LineSegment { Point2D start, end; };
namespace OverkillSoft {
namespace APlusB {
namespace Core {
namespace Arithmetic {
namespace details {
template<typename T>
struct IsInteger : std::false_type {};
template<> struct IsInteger<char> : stdtrue_type {};
template<> struct IsInteger<signed char> : stdtrue_type {};
template<> struct IsInteger<unsigned char> : stdtrue_type {};
template<> struct IsInteger<short> : stdtrue_type {};
template<> struct IsInteger<unsigned short> : stdtrue_type {};
template<> struct IsInteger<int> : stdtrue_type {};
template<> struct IsInteger<unsigned int> : stdtrue_type {};
template<> struct IsInteger<long> : stdtrue_type {};
template<> struct IsInteger<unsigned long> : stdtrue_type {};
template<> struct IsInteger<long long> : stdtrue_type {};
template<> struct IsInteger<unsigned long long> : stdtrue_type {};
#ifdef __cpp_char8_t
template<> struct IsInteger<char8_t> : stdtrue_type {};
#endif
#ifdef __cpp_lib_byte
template<> struct IsIntegerstd::byte : std::true_type {};
#endif
} // namespace details
class AdditionStrategy {
public:
virtual ~AdditionStrategy() = default;
virtual ResultType execute(Integer a, Integer b) const = 0;
virtual std::string name() const = 0;
};
class SimpleAdditionStrategy : public AdditionStrategy {
public:
ResultType execute(Integer a, Integer b) const override {
#if ENABLE_VERBOSE_LOGGING
stdcerr << "[SimpleAdditionStrategy] Adding " << a << " and " << b << " using operator+." << stdendl;
#endif
return a + b;
}
std::string name() const override { return "SimpleAddition"; }
};
class BitwiseAdditionStrategy : public AdditionStrategy {
public:
ResultType execute(Integer a, Integer b) const override {
#if ENABLE_VERBOSE_LOGGING
stdcerr << "[BitwiseAdditionStrategy] Adding " << a << " and " << b << " using bitwise operations." << stdendl;
#endif
while (b != 0) {
Integer carry = a & b;
a = a ^ b;
b = carry << 1;
}
return a;
}
std::string name() const override { return "BitwiseAddition"; }
};
class RecursiveAdditionStrategy : public AdditionStrategy {
private:
ResultType add_recursive(Integer a, Integer b) const {
if (b == 0) return a;
#if ENABLE_VERBOSE_LOGGING
stdcerr << "[RecursiveAdditionStrategy] Recursion depth: " << (b > 0 ? b : -b) << stdendl;
#endif
if (b > 0)
return add_recursive(a + 1, b - 1);
else if (b < 0)
return add_recursive(a - 1, b + 1);
return a;
}
public:
ResultType execute(Integer a, Integer b) const override {
#if ENABLE_VERBOSE_LOGGING
stdcerr << "[RecursiveAdditionStrategy] Starting recursive addition." << stdendl;
#endif
return add_recursive(a, b);
}
std::string name() const override { return "RecursiveAddition"; }
};
class MultithreadedAdditionStrategy : public AdditionStrategy {
private:
mutable std::mutex m_mutex;
mutable ResultType m_result;
mutable bool m_completed;
public:
MultithreadedAdditionStrategy() : m_result(0), m_completed(false) {}
};
template<int A, int B>
struct TemplateMetaAdder {
static constexpr int value = A + B;
};
class TemplateMetaAdditionStrategy : public AdditionStrategy {
public:
ResultType execute(Integer a, Integer b) const override {
#if ENABLE_VERBOSE_LOGGING
stdcerr << "[TemplateMetaAdditionStrategy] This strategy only works at compile time. Falling back to simple addition." << stdendl;
#endif
return a + b;
}
std::string name() const override { return "TemplateMetaAddition"; }
};
} // namespace Arithmetic
class Adder {
private:
stdunique_ptrArithmetic::AdditionStrategy m_strategy;
mutable stdmutex m_mutex;
public:
explicit Adder(ArithmeticAdditionStrategy* strategy) : m_strategy(strategy) {
#if ENABLE_VERBOSE_LOGGING
stdcerr << "[Adder] Constructed with strategy: " << (strategy ? strategy->name() : "nullptr") << stdendl;
#endif
if (!m_strategy) {
throw stdinvalid_argument("Addition strategy cannot be null");
}
}
};
namespace Input {
class InputReader {
public:
virtual ~InputReader() = default;
virtual std::string readLine() = 0;
virtual bool isGood() const = 0;
};
class StdinReader : public InputReader {
private:
stdistream& m_inputStream;
public:
explicit StdinReader(stdistream& is = stdcin) : m_inputStream(is) {
#if ENABLE_VERBOSE_LOGGING
stdcerr << "[StdinReader] Created, using stream: " << (void*)&m_inputStream << std::endl;
#endif
}
};
class FixedStringReader : public InputReader {
private:
stdstring m_fixedLine;
bool m_good;
public:
explicit FixedStringReader(const stdstring& line) : m_fixedLine(line), m_good(true) {
#if ENABLE_VERBOSE_LOGGING
stdcerr << "[FixedStringReader] Created with fixed line: "" << line << """ << stdendl;
#endif
}
};
class CompositeReader : public InputReader {
private:
stdvector<stdunique_ptr<InputReader>> m_readers;
size_t m_currentIndex = 0;
public:
void addReader(stdunique_ptr<InputReader> reader) {
m_readers.push_back(stdmove(reader));
}
};
} // namespace Input
namespace Parsing {
class Parser {
public:
virtual ~Parser() = default;
virtual InputPair parse(const std::string& input) = 0;
};
class WhitespaceParser : public Parser {
private:
stdstring trim(const stdstring& s) const {
size_t start = s.find_first_not_of(" \t\n\r");
size_t end = s.find_last_not_of(" \t\n\r");
if (start == stdstringnpos) return "";
return s.substr(start, end - start + 1);
}
public:
InputPair parse(const stdstring& input) override {
#if ENABLE_VERBOSE_LOGGING
stdcerr << "[WhitespaceParser] Parsing string: "" << input << """ << stdendl;
#endif
stdistringstream iss(input);
Integer a, b;
if (!(iss >> a >> b)) {
#if ENABLE_VERBOSE_LOGGING
stdcerr << "[WhitespaceParser] Parsing failed." << stdendl;
#endif
throw stdinvalid_argument("Input does not contain two integers");
}
#if ENABLE_VERBOSE_LOGGING
stdcerr << "[WhitespaceParser] Parsed numbers: " << a << " and " << b << stdendl;
#endif
return stdmake_pair(a, b);
}
};
template<char Delimiter = ' '>
class DelimitedParser : public Parser {
public:
InputPair parse(const stdstring& input) override {
#if ENABLE_VERBOSE_LOGGING
stdcerr << "[DelimitedParser] Parsing with delimiter '" << Delimiter << "'" << stdendl;
#endif
stdstringstream ss(input);
stdstring token;
stdvectorstd::string tokens;
while (stdgetline(ss, token, Delimiter)) {
if (!token.empty()) {
tokens.push_back(token);
}
}
if (tokens.size() != 2) {
throw stdinvalid_argument("Expected exactly two numbers");
}
Integer a = stdstoi(tokens[0]);
Integer b = stdstoi(tokens[1]);
return std::make_pair(a, b);
}
};
#ifdef __cpp_lib_regex
#include <regex>
class RegexParser : public Parser {
private:
stdregex m_pattern;
public:
RegexParser() : m_pattern(R"(^\s*([+-]?\d+)\s+([+-]?\d+)\s*$)") {
#if ENABLE_VERBOSE_LOGGING
stdcerr << "[RegexParser] Constructed with regex pattern." << stdendl;
#endif
}
InputPair parse(const stdstring& input) override {
stdsmatch match;
if (!stdregex_match(input, match, m_pattern) || match.size() != 3) {
throw stdinvalid_argument("Input does not match expected pattern");
}
Integer a = stdstoi(match[1].str());
Integer b = stdstoi(match[2].str());
return stdmake_pair(a, b);
}
};
#endif
} // namespace Parsing
namespace Validation {
class Validator {
public:
virtual ~Validator() = default;
virtual bool validate(const InputPair& pair) const = 0;
virtual std::string errorMessage() const = 0;
};
class IntRangeValidator : public Validator {
private:
mutable stdstring m_lastError;
public:
bool validate(const InputPair& pair) const override {
Integer a = pair.first;
Integer b = pair.second;
if (a < MathConstantsMIN_INT || a > MathConstantsMAX_INT) {
m_lastError = "First number out of range";
return false;
}
if (b < MathConstantsMIN_INT || b > MathConstantsMAX_INT) {
m_lastError = "Second number out of range";
return false;
}
return true;
}
stdstring errorMessage() const override { return m_lastError; }
};
class PositiveNumberValidator : public Validator {
private:
mutable stdstring m_lastError;
public:
bool validate(const InputPair& pair) const override {
if (pair.first < 0) {
m_lastError = "First number is negative";
return false;
}
if (pair.second < 0) {
m_lastError = "Second number is negative";
return false;
}
return true;
}
stdstring errorMessage() const override { return m_lastError; }
};
class CompositeValidator : public Validator {
private:
stdvector<stdunique_ptr<Validator>> m_validators;
mutable stdstring m_lastError;
public:
void addValidator(stdunique_ptr<Validator> validator) {
m_validators.push_back(stdmove(validator));
}
bool validate(const InputPair& pair) const override {
for (const auto& v : m_validators) {
if (!v->validate(pair)) {
m_lastError = v->errorMessage();
return false;
}
}
return true;
}
stdstring errorMessage() const override { return m_lastError; }
};
} // namespace Validation
namespace Output {
class OutputFormatter {
public:
virtual ~OutputFormatter() = default;
virtual std::string format(ResultType result) const = 0;
};
class SimpleFormatter : public OutputFormatter {
public:
stdstring format(ResultType result) const override {
#if ENABLE_VERBOSE_LOGGING
stdcerr << "[SimpleFormatter] Formatting result: " << result << stdendl;
#endif
return stdto_string(result);
}
};
class DecoratedFormatter : public OutputFormatter {
private:
stdstring m_prefix;
stdstring m_suffix;
public:
DecoratedFormatter(const stdstring& prefix = "", const stdstring& suffix = "")
: m_prefix(prefix), m_suffix(suffix) {
#if ENABLE_VERBOSE_LOGGING
stdcerr << "[DecoratedFormatter] Created with prefix "" << prefix << "", suffix "" << suffix << """ << stdendl;
#endif
}
stdstring format(ResultType result) const override {
return m_prefix + stdto_string(result) + m_suffix;
}
};
class JsonFormatter : public OutputFormatter {
public:
stdstring format(ResultType result) const override {
stdostringstream oss;
oss << "{ "result": " << result << " }";
return oss.str();
}
};
class XmlFormatter : public OutputFormatter {
public:
stdstring format(ResultType result) const override {
stdostringstream oss;
oss << "<result>" << result << "</result>";
return oss.str();
}
};
} // namespace Output
namespace Logging {
enum class LogLevel {
DEBUG,
INFO,
WARNING,
ERROR
};
class Logger {
private:
LogLevel m_threshold;
stdostream& m_outputStream;
public:
explicit Logger(LogLevel threshold = LogLevelINFO, stdostream& os = stdcerr)
: m_threshold(threshold), m_outputStream(os) {}
};
static Logger g_logger(LogLevelDEBUG, stdcerr);
#define LOG_DEBUG(...) g_logger.log(LogLevelDEBUG, "[DEBUG] ", VA_ARGS)
#define LOG_INFO(...) g_logger.log(LogLevelINFO, "[INFO] ", VA_ARGS)
#define LOG_WARNING(...) g_logger.log(LogLevelWARNING, "[WARNING] ", VA_ARGS)
#define LOG_ERROR(...) g_logger.log(LogLevelERROR, "[ERROR] ", VA_ARGS)
} // namespace Logging
namespace Utility {
void nop() {}
int random_number() {
static stdrandom_device rd;
static stdmt19937 gen(rd());
static std::uniform_int_distribution<> dis(0, 1000);
return dis(gen);
}
void print_banner() {
stdcerr << R"(
╔═══════════════════════════════════════════════════════════════════╗
║ A+B SOLVER - ULTIMATE EDITION ║
║ (with extra verbosity) ║
╚═══════════════════════════════════════════════════════════════════╝
)" << stdendl;
}
} // namespace Utility
class Application {
private:
stdunique_ptrInput::InputReader m_reader;
stdunique_ptrParsing::Parser m_parser;
stdunique_ptrValidation::Validator m_validator;
stdunique_ptr<Adder> m_adder;
std::unique_ptrOutput::OutputFormatter m_formatter;
public:
Application(stdunique_ptrInput::InputReader reader,
stdunique_ptrParsing::Parser parser,
stdunique_ptrValidation::Validator validator,
stdunique_ptr<Adder> adder,
stdunique_ptrOutput::OutputFormatter formatter)
: m_reader(stdmove(reader))
, m_parser(stdmove(parser))
, m_validator(stdmove(validator))
, m_adder(stdmove(adder))
, m_formatter(stdmove(formatter)) {
LOG_INFO("Application constructed with all dependencies.");
}
};
} // namespace Core
} // namespace APlusB
} // namespace OverkillSoft
namespace {
class GlobalInitializer {
public:
GlobalInitializer() {
stdcerr << "[GlobalInitializer] Program started initializing globals." << stdendl;
}
~GlobalInitializer() {
stdcerr << "[GlobalInitializer] Program cleaning up globals." << stdendl;
}
} g_initializer;
}
template<int N>
constexpr int sum_upto() {
return N + sum_upto<N-1>();
}
template<> constexpr int sum_upto<0>() { return 0; }
static_assert(sum_upto<5>() == 15, "Compile-time sum works");
template<typename... Ts>
struct TypeList {};
using DummyTypes = TypeList<int, double, char, float, long, short, bool>;
template int sum_upto<10>();
template int sum_upto<20>();
int main(int argc, char* argv[]) {
using namespace OverkillSoftAPlusBCore;
using namespace OverkillSoftAPlusBCore::Logging;
}
