Add Day7A.cpp and day 8
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67
Day7/Day7A.cpp
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67
Day7/Day7A.cpp
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#include <iostream>
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#include <vector>
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#include <fstream>
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#include <unordered_map>
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#include <set>
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#include <tuple>
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typedef std::unordered_multimap<char, char> graph_type;
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std::tuple<graph_type, std::set<char>> build_graph()
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{
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graph_type graph;
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std::ifstream file("Day7.in");
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std::string line;
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std::set<char> nodes;
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while (std::getline(file, line)) {
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char a = line[5];
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char b = line[36];
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std::cout << "a: " << a << ", b:" << b << std::endl;
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graph.insert({ b, a });
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nodes.insert(a);
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nodes.insert(b);
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}
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return std::make_tuple(graph, nodes);
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}
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bool node_blocked(graph_type &graph, std::set<char> &to_consider, char node)
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{
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auto [start, end] = graph.equal_range(node);
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for (auto pair = start; pair != end; ++pair) {
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char parent = pair->second;
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if (to_consider.count(parent) > 0) {
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return true;
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}
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}
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return false;
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}
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int main(int argc, char **argv)
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{
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auto [graph, to_consider] = build_graph();
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std::vector<char> order;
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while (!to_consider.empty()) {
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for (auto node = to_consider.begin(); node != to_consider.end(); ++node) {
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bool blocked = node_blocked(graph, to_consider, *node);
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if (blocked)
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continue;
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order.push_back(*node);
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std::cout << *node;
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to_consider.erase(node);
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break;
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}
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}
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std::cout << std::endl;
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return 0;
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}
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39
Day8/Day8A.cpp
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39
Day8/Day8A.cpp
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#include <iostream>
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#include <vector>
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std::vector<int> read_input()
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{
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std::vector<int> input;
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input.reserve(20000);
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int i = 0;
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while (std::cin >> i) {
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input.push_back(i);
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}
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return input;
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}
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int read_node(std::vector<int>::iterator &it)
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{
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int child_count = *it++;
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int meta_count = *it++;
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int value = 0;
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for (int i = 0; i < child_count; i++) {
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value += read_node(it);
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}
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for (int i = 0; i < meta_count; i++) {
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value += *it++;
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}
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return value;
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}
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int main(int argc, char **argv)
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{
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std::vector<int> input = read_input();
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auto iterator = input.begin();
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std::cout << read_node(iterator) << std::endl;
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}
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10
Day8/Day8A.py
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10
Day8/Day8A.py
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def read_node(it):
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child_count, meta_count = next(it), next(it)
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child_sum = sum(read_node(it) for _ in range(child_count))
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own_sum = sum(next(it) for _ in range(meta_count))
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return child_sum + own_sum
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it = (int(x) for x in input().split())
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print(read_node(it))
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48
Day8/Day8B.cpp
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48
Day8/Day8B.cpp
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#include <iostream>
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#include <vector>
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std::vector<int> read_input()
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{
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std::vector<int> input;
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input.reserve(20000);
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int i = 0;
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while (std::cin >> i)
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input.push_back(i);
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return input;
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}
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int read_node(std::vector<int>::iterator &it)
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{
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int child_count = *it++;
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int meta_count = *it++;
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int value = 0;
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if (child_count == 0) {
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for (int i = 0; i < meta_count; i++)
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value += *it++;
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return value;
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}
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std::vector<int> children;
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for (int i = 0; i < child_count; i++) {
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children.push_back(read_node(it));
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}
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for (int i = 0; i < meta_count; i++) {
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int index = *it++;
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if (index > 0 && index <= children.size())
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value += children[index - 1];
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}
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return value;
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}
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int main(int argc, char **argv)
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{
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std::vector<int> input = read_input();
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auto iterator = input.begin();
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std::cout << read_node(iterator) << std::endl;
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}
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18
Day8/Day8B.py
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18
Day8/Day8B.py
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def read_node(it):
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child_count, meta_count = next(it), next(it)
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if child_count == 0:
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return sum(next(it) for _ in range(meta_count))
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children = [read_node(it) for _ in range(child_count)]
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value = 0
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for _ in range(meta_count):
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index = next(it)
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if index > 0 and index <= len(children):
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value += children[index - 1]
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return value
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it = (int(x) for x in input().split())
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print(read_node(it))
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