Estoy intentando hacer años anteriores

2019/day_1/tyranny.cc

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+#include <vector>
+#include <iostream>
+#include <fstream>
+#include <string>
+
+std::vector<int> read_input_file() {
+  std::ifstream file("input");
+  std::vector<int> data;
+  std::string line;
+
+  while(std::getline(file, line)) 
+    data.push_back(std::stoi(line));
+
+  return data;
+}
+
+int calculate_fuel(int mass) {
+  return (mass / 3) - 2;
+}
+
+int main() {
+  auto data = read_input_file();
+
+  int result_a = 0;
+  int result_b = 0;
+
+  for(auto &input : data) {
+    int fuel = calculate_fuel(input);
+    result_a += fuel;
+
+    while(fuel > 0){
+      result_b += fuel;
+      fuel = calculate_fuel(fuel);
+    }
+  }
+
+  std::cout << result_a << ", " << result_b << std::endl;
+
+  return 0;
+}