Day 9 Question 1

Day9/Question1/main.cpp

@@ -0,0 +1,37 @@
+#include <cmath>
+#include <cstdint>
+#include <cstdlib>
+#include <fstream>
+#include <iostream>
+#include <string>
+#include <vector>
+
+struct Vector2D {
+  int64_t x, y;
+};
+
+int main() {
+  std::fstream input("input");
+  std::string currentLine = "";
+  std::vector<Vector2D> points{};
+  int64_t password = 0;
+
+  while (std::getline(input, currentLine, '\n')) {
+    uint16_t positionOfTheComma = currentLine.find(',');
+    points.push_back({std::stoll(currentLine.substr(0, positionOfTheComma)),
+                      std::stoll(currentLine.substr(positionOfTheComma + 1))});
+  }
+
+  uint64_t count = 0, pointsSize = points.size();
+  for (Vector2D &point : points) {
+    for (uint64_t index = ++count; index < pointsSize; index++) {
+      Vector2D *position1 = &point, *position2 = &points[index];
+      int64_t area = (std::abs(position2->x - position1->x) + 1) *
+                     (std::abs(position2->y - position1->y) + 1);
+      if (area > password) {
+        password = area;
+      }
+    }
+  }
+  std::cout << password << std::endl;
+}