Primeros 2 dias de advent of code :3

.gitignore

@@ -0,0 +1 @@
+a.out

2020/day_1/input

@@ -0,0 +1,200 @@
+1211
+1698
+1787
+1947
+1888
+444
+1819
+1890
+1940
+1884
+1917
+1814
+1724
+1561
+1823
+1266
+1982
+1826
+1871
+1692
+1665
+1081
+1847
+640
+1861
+1632
+1916
+1921
+1450
+1806
+1950
+1969
+1757
+1766
+1799
+422
+1865
+1934
+1954
+1640
+1743
+1812
+1745
+1574
+1904
+1510
+1491
+1977
+1727
+1979
+1842
+1784
+1655
+1991
+1296
+1849
+1863
+1886
+1696
+1716
+1679
+1848
+1540
+1780
+1926
+1986
+1898
+1448
+315
+1568
+1869
+1875
+2010
+1268
+1892
+1248
+1746
+1987
+1963
+20
+1575
+1827
+1653
+1851
+1365
+1599
+1688
+1943
+1677
+1320
+154
+1490
+1737
+1573
+1908
+1667
+1151
+1761
+1587
+1924
+1941
+1731
+1669
+1857
+1723
+1880
+1970
+1791
+1928
+1942
+1816
+1989
+1832
+1911
+1711
+1817
+1893
+896
+1998
+1720
+317
+1964
+1379
+1750
+1971
+1322
+1992
+1347
+1608
+1373
+1668
+1252
+373
+1968
+1754
+1709
+1988
+1946
+1537
+1758
+1830
+624
+1694
+1914
+1867
+1145
+1973
+1769
+1773
+1424
+1777
+1659
+1789
+1907
+1201
+1967
+1682
+1952
+1978
+1937
+1974
+1488
+1896
+1657
+1420
+1935
+1778
+1822
+1703
+2003
+119
+1149
+1732
+1878
+1938
+1918
+1797
+1836
+1741
+1579
+1589
+1999
+1772
+1853
+1793
+1768
+1759
+1216
+1765
+1944
+1735
+1580
+1756
+1308
+1786
+1962
+1981
+1156
+1948
+1894

2020/day_1/report_repair.cpp

@@ -0,0 +1,36 @@
+#include <algorithm>
+#include <iostream>
+#include <fstream>
+#include <set>
+#include <string>
+
+std::set<int> read_input_file() {
+  std::ifstream file("input");
+  std::set<int> data;
+  std::string line;
+
+  while(std::getline(file, line)) 
+    data.insert(std::stoi(line));
+
+  file.close();
+  return data;
+}
+
+int main(){
+  auto data = read_input_file();
+  int iterations = 0;
+
+  for(auto &i: data) {
+    int rest = 2020 - i;
+
+    for(auto &j: data) {
+      int second_rest = rest - j;
+      if (data.count(second_rest)) {
+        std::cout << i * j * second_rest << std::endl;
+        return 0;
+      }
+    }
+  }
+
+  return 1;
+}

2020/day_1/report_repair.py

@@ -0,0 +1,21 @@
+def solve(data):
+    iterations = 0
+    for x in range(len(data)):
+        rest = 2020 - data[x]
+
+        for y in range(x + 1, len(data)):
+            iterations += 1
+            second_rest = rest - data[y]
+
+            if second_rest in data:
+                print((data[x], data[y], second_rest), (iterations), data[x] * data[y] * second_rest)
+                return
+
+
+if __name__ == '__main__':
+    with open('input') as f:
+        data = [int(line) for line in f]
+        data.sort()
+
+    solve(data)
+

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))