#include <cassert>
#include <sstream>
#include <string>
struct Record { std::string name; int count; };
bool parse_record(const std::string& line, Record& out) {
    std::istringstream input(line);
    std::string name;
    int count = 0;
    if (!(input >> name >> count) || count < 0) return false;
    input >> std::ws;
    if (!input.eof()) return false;
    out.name.swap(name);
    out.count = count;
    return true;
}
int main() {
    Record record{"old", 8};
    assert(parse_record("alpha 3   ", record));
    assert(record.name == "alpha" && record.count == 3);
    for (const std::string line : {"beta -1", "beta 2 extra", "beta 2x", "beta", ""}) {
        assert(!parse_record(line, record));
        assert(record.name == "alpha" && record.count == 3);
    }
    assert(parse_record("zero 0", record));
    assert(record.name == "zero" && record.count == 0);
}