#pragma once
#include <string>
#include <cctype>

static inline std::string trimCopy(const std::string& s) {
    size_t start = 0;
    while (start < s.size() && std::isspace((unsigned char)s[start])) ++start;
    size_t end = s.size();
    while (end > start && std::isspace((unsigned char)s[end - 1])) --end;
    return s.substr(start, end - start);
}