Error Code Mapping

#include <iostream>
#include <cstdint>
using namespace std;

enum class ErrorCode : uint8_t {
    None = 0,
    Timeout = 1,
    Overflow = 2,
    Invalid = 3
};

const char* toString(ErrorCode e) {
    switch (e) {
        case ErrorCode::None:     return "None";
        case ErrorCode::Timeout:  return "Timeout";
        case ErrorCode::Overflow: return "Overflow";
        case ErrorCode::Invalid:  return "Invalid";
    }
}

int main() {
    int x;
    cin >> x;

    // Input is guaranteed to be in the range 0–3 by problem definition
    ErrorCode e = static_cast<ErrorCode>(x);

    cout << toString(e);
    return 0;
}

Solving Approach