Day 6 Question 1

Day6/Question1/main.cpp

@@ -0,0 +1,61 @@
+#include <algorithm>
+#include <cstdint>
+#include <fstream>
+#include <iostream>
+#include <string>
+#include <vector>
+
+int main() {
+  std::fstream input("input");
+  std::string currentLine = "", lineOfOperations = "";
+  std::vector<std::string> lines{};
+  std::vector<uint64_t> results{};
+  std::vector<uint64_t> startPositionOfOperations{};
+
+  while (std::getline(input, currentLine, '\n')) {
+    lines.push_back(currentLine);
+  }
+
+  // Just removing the operations for a for loop below
+  lineOfOperations = lines.back();
+  lines.pop_back();
+
+  // Since only 3 possibilities are '+', '*', and ' '
+  uint64_t count = 0;
+  for (char character : lineOfOperations) {
+    if (character != ' ') {
+      startPositionOfOperations.push_back(count);
+    }
+    count++;
+  }
+
+  // Now we have each coloums length :^)
+  count = 0;
+  uint64_t total = 0;
+  for (uint64_t PositionOfAnOperation : startPositionOfOperations) {
+    bool isAddition = lineOfOperations[PositionOfAnOperation] == '+';
+    uint64_t thisOperationsResult = 0, number = 0,
+             NextPositionOfAnOperation = startPositionOfOperations[std::min(
+                 ++count, startPositionOfOperations.size())];
+
+    for (std::string line : lines) {
+      number = std::stoull(
+          line.substr(PositionOfAnOperation,
+                      PositionOfAnOperation - NextPositionOfAnOperation));
+      if (isAddition) {
+        thisOperationsResult += number;
+        continue;
+      }
+
+      if (thisOperationsResult == 0) {
+        thisOperationsResult = number;
+        continue;
+      }
+      thisOperationsResult *= number;
+    }
+
+    total += thisOperationsResult;
+  }
+  std::cout << total << std::endl;
+  return 0;
+}