finish 3 beta

Author: sdwh

[8 kyu]Object Oriented Piracy.py

@@ -0,0 +1,10 @@
+class Ship:
+    def __init__(self, draft, crew):
+        self.draft = draft
+        self.crew = crew
+    
+    def is_worth_it(self):
+        return self.draft - 1.5 * self.crew >= 20
+
+boat = Ship(21,0)
+print(boat.is_worth_it())

[beta]Complete The Pattern #1.py

@@ -0,0 +1,7 @@
+def pattern(n):
+    if n < 1:
+        return ''
+    res = '1'
+    for i in range(2,n+1):
+        res += '\n' + str(i) * i
+    return res

[beta]Complete The Pattern #2.py

@@ -0,0 +1,13 @@
+def pattern(n):
+    string = ''.join([str(i) for i in range (1,n+1)][::-1])
+    res = ''
+    for i in range(1,n+1):
+        res += '\n' if len(res) > 0 else ''
+        res += string
+        string = string[:-1] if len(str(i)) == 1 else string[:-2]
+    return res
+        
+
+
+for i in (13,):
+    print(pattern(i))    

[beta]Complete The Pattern #3 (Horizontal Image of #2).py

@@ -0,0 +1,12 @@
+def pattern(n):
+    string = ''
+    res = []
+    for i in range(n,0,-1):
+        string += str(i)
+        res.append(string)
+    return '\n'.join(res)
+        
+
+
+for i in (13,):
+    print(pattern(i))    

[leetcode]Isomorphic Strings.py

@@ -0,0 +1,18 @@
+class Solution:
+    # @param {string} s
+    # @param {string} t
+    # @return {boolean}
+    def isIsomorphic(self, s, t):
+        def isomorphic(s,t):
+            d = {}
+            for k,v in zip(s,t):
+                d[k] = v
+            return ''.join([d[c] for c in s]) == t
+        return isomorphic(s,t) and isomorphic(t,s)
+
+test = Solution()
+print(test.isIsomorphic('ab','aa'))
+print(test.isIsomorphic('egg','add'))
+print(test.isIsomorphic('egg','adv'))
+print(test.isIsomorphic('paper','title'))
+print(test.isIsomorphic('paper','title'))

[leetcode]Length of Last Word.py

@@ -0,0 +1,14 @@
+class Solution:
+    # @param {string} s
+    # @return {integer}
+    def lengthOfLastWord(self, s):
+        num = 0
+        s = s.strip()
+        for c in s[::-1]:
+            if c == ' ':
+                break
+            num += 1
+        return num
+
+test = Solution()
+print(test.lengthOfLastWord('H '))