add answer 2

2020/2/solution.py

@@ -0,0 +1,50 @@
+#!/usr/bin/python
+
+fd = open('input', 'r')
+lines = fd.readlines()
+
+def checka(minimum, maximum, letter, string):
+    cnt = 0
+    for i in string:
+        if i == letter: cnt += 1
+    if cnt >= minimum and cnt <= maximum:
+        return True
+    return False
+
+def checkb(minimum, maximum, letter, string):
+    cnt = 0
+    if string[minimum - 1] == letter: cnt += 1
+    if string[maximum - 1] == letter: cnt += 1
+    if cnt == 1: return True
+    return False
+
+def parse(line):
+    colon = line.split(':')
+    space = colon[0].split(' ')
+    dash = space[0].split('-')
+
+    minimum = int(dash[0])
+    maximum = int(dash[1])
+    letter = space[1]
+    string = colon[1].lstrip().rstrip()
+
+    return (minimum, maximum, letter, string)
+
+def solutiona():
+    cnt = 0
+    for i in lines:
+        parsed = parse(i)
+        if checka(parsed[0], parsed[1], parsed[2], parsed[3]): cnt += 1
+
+    print(str(cnt))
+
+def solutionb():
+    cnt = 0
+    for i in lines:
+        parsed = parse(i)
+        if checkb(parsed[0], parsed[1], parsed[2], parsed[3]): cnt += 1
+
+    print(str(cnt))
+
+solutiona()
+solutionb()