50 lines
1.1 KiB
C++
50 lines
1.1 KiB
C++
#include <algorithm>
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#include <cassert>
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#include <iostream>
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#include <string>
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struct Box
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{
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/** Construct box.
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* \param s String representation of dimensions 'lxwxh'
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*/
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explicit Box(std::string const& s)
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{
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std::size_t pos = 0;
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l_ = std::stoul(s, &pos, 10);
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assert(s[pos] == 'x');
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auto s2 = s.substr(pos + 1);
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w_ = std::stoul(s2, &pos, 10);
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assert(s2[pos] == 'x');
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s2 = s2.substr(pos + 1);
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h_ = std::stoul(s2, &pos, 10);
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assert(pos == s2.length());
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}
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// How much paper does this box need?
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[[nodiscard]] auto paper_needed() const -> std::uint64_t
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{
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std::uint64_t s1 = l_ * w_;
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std::uint64_t s2 = w_ * h_;
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std::uint64_t s3 = h_ * l_;
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return 2 * (s1 + s2 + s3) + std::min({s1, s2, s3});
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}
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std::uint64_t l_;
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std::uint64_t w_;
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std::uint64_t h_;
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};
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auto main() -> int
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{
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std::uint64_t total = 0;
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for (std::string line; std::getline(std::cin, line);) {
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Box b(line);
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auto amount = b.paper_needed();
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std::cout << "Box " << line << " needs " << amount << " sq.feet\n";
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total += amount;
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}
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std::cout << "Total = " << total << " square feet\n";
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return 0;
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} |