Estoy intentando hacer años anteriores

2019/day_2/input

@@ -0,0 +1,2 @@
+1,0,0,3,1,1,2,3,1,3,4,3,1,5,0,3,2,6,1,19,2,19,13,23,1,23,10,27,1,13,27,31,2,31,10,35,1,35,9,39,1,39,13,43,1,13,43,47,1,47,13,51,1,13,51,55,1,5,55,59,2,10,59,63,1,9,63,67,1,6,67,71,2,71,13,75,2,75,13,79,1,79,9,83,2,83,10,87,1,9,87,91,1,6,91,95,1,95,10,99,1,99,13,103,1,13,103,107,2,13,107,111,1,111,9,115,2,115,10,119,1,119,5,123,1,123,2,127,1,127,5,0,99,2,14,0,0
+

2019/day_2/intcode.hh

@@ -0,0 +1,50 @@
+#ifndef INTCODE_H
+#define INTCODE_H
+
+#include<vector>
+#include<iostream>
+
+class IntCode {
+  std::vector<int> memory;
+  bool halt = false;
+  int ip = 0; //instruction pointer
+
+  void op_add() {
+    int param_1 = memory[memory[ip+1]];
+    int param_2 = memory[memory[ip+2]];
+
+    memory[memory[ip+3]] = param_1 + param_2;
+    ip += 4;
+  }
+
+  void op_mult() {
+    int param_1 = memory[memory[ip+1]];
+    int param_2 = memory[memory[ip+2]];
+
+    memory[memory[ip+3]] = param_1 * param_2;
+    ip += 4;
+  }
+
+  void run() {
+    while(!halt){
+      switch(memory[ip]) {
+        case 1:  op_add();    break;
+        case 2:  op_mult();   break;
+        case 99: halt = true; break;
+      }
+    }
+  }
+
+  public:
+  IntCode(std::vector<int> memory) {
+    this->memory = memory;
+    run();
+  }
+
+
+  int get(int address) {
+    return memory[address];
+  }
+};
+
+#endif

2019/day_2/program_alarm.cc

@@ -0,0 +1,47 @@
+#include <vector>
+#include <iostream>
+#include <fstream>
+#include <string>
+
+#include "intcode.hh"
+
+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;
+}
+
+void solve_a(std::vector<int> memory) {
+  memory[1] = 12;
+  memory[2] = 2;
+
+  auto vm = IntCode(memory);
+  std::cout << vm.get(0) << std::endl;
+}
+
+void solve_b(std::vector<int> memory) {
+  for(int x = 0; x < 99; x++){
+    for(int y = 0; y < 99; y++){
+      memory[1] = x;
+      memory[2] = y;
+
+      auto vm = IntCode(memory);
+      if(vm.get(0) == 19690720) 
+        std::cout << x << ", " << y << " = " << (100 * x) + y << std::endl;
+    }
+  }
+}
+
+int main() {
+  auto memory = read_input_file();
+
+  solve_a(memory);
+  solve_b(memory); 
+
+  return 0;
+}