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