12

1.py

@@ -0,0 +1,16 @@
+#!/bin/bash
+data = []
+with open("1.txt") as f:
+    for line in f:
+        data.append(int(line))
+
+for i in data:
+    for j in data:
+        if i != j and i + j == 2020:
+            print(i * j)
+
+for i in range(len(data)):
+    for j in range(i, len(data)):
+        for k in range(j, len(data)):
+            if data[i] + data[j] + data[k] == 2020:
+                print(data[i] * data[j] * data[k])

1.txt

@@ -0,0 +1,200 @@
+1934
+1702
+1571
+1737
+1977
+1531
+1428
+1695
+1794
+1101
+13
+1164
+1235
+1289
+1736
+1814
+1363
+1147
+1111
+1431
+1765
+1515
+1184
+1036
+1803
+1791
+1638
+1809
+1283
+1980
+1854
+1878
+1574
+1352
+1151
+730
+1581
+1990
+1919
+2003
+1538
+1663
+1735
+1772
+1830
+1152
+1022
+1774
+1544
+1551
+1835
+1383
+1614
+1396
+1715
+1530
+295
+1208
+1978
+1104
+1691
+1176
+1183
+1909
+1192
+1535
+1924
+1268
+1969
+1954
+1760
+1077
+1734
+1371
+1676
+1933
+1400
+1928
+1982
+1541
+1106
+1248
+1346
+1782
+1142
+1849
+1798
+1362
+1379
+1886
+1265
+1226
+1751
+1575
+1027
+1710
+1601
+1205
+1922
+1452
+1206
+1263
+2000
+1957
+1951
+1834
+1533
+1149
+1245
+1564
+1182
+1237
+1013
+1254
+1895
+1504
+1480
+1556
+1821
+1589
+1864
+1573
+1698
+1927
+1434
+516
+1722
+1360
+1940
+1212
+1329
+1675
+1812
+1917
+1302
+1604
+1336
+1233
+1405
+1179
+1169
+1081
+1941
+1553
+1236
+1824
+1923
+1938
+1475
+1446
+1545
+1853
+1664
+317
+1489
+1884
+1743
+1621
+1128
+1474
+1505
+394
+1387
+1509
+1627
+1914
+1913
+1949
+1843
+1847
+1882
+1486
+1082
+1802
+1645
+1690
+1629
+1377
+2004
+1044
+1191
+1014
+1857
+1813
+1572
+1055
+1002
+1721
+1273
+1417
+1968
+1888
+1863
+1278
+1141
+1964
+1259
+1823
+1181
+1779

2.py

@@ -0,0 +1,20 @@
+count1 = 0
+count2 = 0
+with open("2.txt") as f:
+    for line in f:
+        spec, data = line.split(": ")
+        nums, letter = spec.split(" ")
+        lo, hi = nums.split("-")
+        lo = int(lo)
+        hi = int(hi)
+        c = data.count(letter)
+        if c >= lo and c <= hi:
+            count1 += 1
+
+        a = lo - 1 < len(data) and data[lo - 1] == letter
+        b = hi - 1 < len(data) and data[hi - 1] == letter
+        if a ^ b:
+            count2 += 1
+print(count1)
+print(count2)
+