Primeros 2 dias de advent of code :3

2020/day_2/password_philosophy.cpp

@@ -0,0 +1,56 @@
+#include <algorithm>
+#include <iostream>
+#include <sstream>
+#include <fstream>
+#include <vector>
+#include <string>
+
+std::vector<std::string> read_input_file() {
+  std::ifstream file("input");
+  std::vector<std::string> data;
+  std::string line;
+
+  while(std::getline(file, line)) 
+    data.push_back(line);
+
+  return data;
+}
+
+std::vector<std::string> split(const std::string &s, char delimiter) {
+  std::vector<std::string> tokens;
+  std::string token;
+  std::istringstream token_stream(s);
+
+  while(std::getline(token_stream, token, delimiter)) 
+    tokens.push_back(token);
+
+  return tokens;
+}
+
+int main(){
+  auto data = read_input_file();
+
+  int result_a = 0;
+  int result_b = 0;
+
+  for(auto &line: data) {
+    auto main_split = split(line, ' ');
+    auto number_split = split(main_split[0], '-');
+
+    int first = stoi(number_split[0]);
+    int second = stoi(number_split[1]);
+    char letter = main_split[1][0];
+    std::string password = main_split[2];
+
+    int count = std::count(password.begin(), password.end(), letter);
+
+    if(first <= count && count <= second) 
+      result_a++;
+    if((password[first - 1] == letter) ^ (password[second - 1] == letter)) 
+      result_b++;
+  }
+
+  std::cout << result_a << ' ' << result_b << std::endl;
+
+  return 0;
+}

2020/day_2/password_philosophy.py

@@ -0,0 +1,23 @@
+with open('input') as f:
+    data = [line.strip().split(' ') for line in f]
+
+def first_policy(first, second, letter, password):
+    return first <= password.count(letter) <= second
+
+def second_policy(first, second, letter, password):
+    return (password[first - 1] == letter) ^ (password[second - 1] == letter)
+
+def analyze(policy):
+    result = 0
+    for line in data:
+        first, second= [int(i) for i in line[0].split('-')]
+        letter = line[1].replace(':', '')
+        password = line[2]
+
+        if policy(first, second, letter, password):
+            result += 1
+
+    return result
+
+print(analyze(first_policy))
+print(analyze(second_policy))