Initial commit

1 files changed, 81 insertions, 0 deletions

diff --git a/years/2015.cpp b/years/2015.cpp
new file mode 100644
index 0000000..67fe1a6
--- /dev/null
+++ b/years/2015.cpp
@@ -0,0 +1,81 @@
+#include "../aoc.h"
+#include <iostream>
+#include <sstream>
+#include <vector>
+
+int y2015_q01_p01(std::string instructions) {
+  int floor = 0;
+
+  for (const char &c : instructions) {
+    floor += c == '(' ? 1 : -1;
+  }
+
+  return floor;
+}
+
+int y2015_q01_p02(std::string instructions) {
+  int floor = 0;
+
+  for (std::size_t i = 0; i < instructions.size(); i++) {
+    floor += instructions[i] == '(' ? 1 : -1;
+    if (floor == -1)
+      return i + 1;
+  }
+
+  return -1;
+}
+
+std::vector<std::string> splitstring(std::string input, char splitter) {
+  std::stringstream splitterstream(input);
+  std::string segment;
+  std::vector<std::string> splatstring;
+
+  while (std::getline(splitterstream, segment, splitter)) {
+    splatstring.push_back(segment);
+  }
+
+  return splatstring;
+}
+
+int y2015_q02_p01_instance(int l, int w, int h) {
+  return std::min(l * w, std::min(l * h, h * w)) + 2 * l * w + 2 * l * h +
+         2 * w * h;
+}
+
+int y2015_q02_p01() {
+  int sum = 0;
+
+  std::string input;
+  getline(std::cin, input);
+
+  while (input != "-1") {
+    std::vector<std::string> split = splitstring(input, 'x');
+    sum += y2015_q02_p01_instance(std::stoi(split[0]), std::stoi(split[1]),
+                                  std::stoi(split[2]));
+
+    getline(std::cin, input);
+  }
+
+  return sum;
+}
+
+int y2015_q02_p02_instance(int l, int w, int h) {
+  return std::min(2 * (l + w), std::min(2 * (l + h), 2 * (w + h))) + l * w * h;
+}
+
+int y2015_q02_p02() {
+  int sum = 0;
+
+  std::string input;
+  getline(std::cin, input);
+
+  while (input != "-1") {
+    std::vector<std::string> split = splitstring(input, 'x');
+    sum += y2015_q02_p02_instance(std::stoi(split[0]), std::stoi(split[1]),
+                                  std::stoi(split[2]));
+
+    getline(std::cin, input);
+  }
+
+  return sum;
+}