68 lines
2.6 KiB
C++
68 lines
2.6 KiB
C++
/*******************************************************************************
|
|
*
|
|
* Copyright (c) 2020 Gnarwhal
|
|
*
|
|
* -----------------------------------------------------------------------------
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files(the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in all
|
|
* copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*
|
|
*******************************************************************************/
|
|
|
|
#include <vector>
|
|
#include <string>
|
|
#include <iostream>
|
|
#include <fstream>
|
|
|
|
#include "types.hpp"
|
|
|
|
auto read_field_and_count_trees(std::vector<std::string> & trees, usize horizontal_increment, usize vertical_increment) -> u64 {
|
|
auto tree_count = u64(0);
|
|
|
|
auto x_index = usize(-horizontal_increment);
|
|
auto y_index = usize(-1);
|
|
auto line = std::string();
|
|
auto file = std::ifstream("day3.input");
|
|
|
|
while (getline(file, line)) {
|
|
auto vertical_check = (++y_index % vertical_increment == 0);
|
|
tree_count += vertical_check * (line[(x_index += (vertical_check * horizontal_increment)) % line.size()] == '#');
|
|
}
|
|
|
|
return tree_count;
|
|
}
|
|
|
|
auto main(i32 argc, char ** argv) -> i32 {
|
|
auto trees = std::vector<std::string>();
|
|
auto tree_counts = std::vector<u64>();
|
|
|
|
tree_counts.push_back(read_field_and_count_trees(trees, 3, 1));
|
|
std::cout << tree_counts[0] << std::endl;
|
|
|
|
tree_counts.push_back(read_field_and_count_trees(trees, 1, 1));
|
|
tree_counts.push_back(read_field_and_count_trees(trees, 5, 1));
|
|
tree_counts.push_back(read_field_and_count_trees(trees, 7, 1));
|
|
tree_counts.push_back(read_field_and_count_trees(trees, 1, 2));
|
|
auto tree_count_product = u64(1);
|
|
for (auto tree_count : tree_counts) {
|
|
tree_count_product *= tree_count;
|
|
}
|
|
std::cout << tree_count_product << std::endl;
|
|
|
|
return 0;
|
|
}
|