#pragma once

#ifndef PP_DEBUG
#include <algorithm>
#include <string>
#endif

inline void toLower(std::string &str) {
    std::transform(str.begin(), str.end(), str.begin(),
        [](unsigned char c){ return std::tolower(c); });
}

inline void toUpper(std::string &str) {
    std::transform(str.begin(), str.end(), str.begin(),
        [](unsigned char c){ return std::toupper(c); });
}

inline bool isInt(const std::string &str) {
    return str.find_first_not_of("1234567890") == std::string::npos;
}