finish one 5kyu,one 6kyu and one beta

Author: sdwh

[5 kyu]RGB To Hex Conversion.py

@@ -0,0 +1,8 @@
+def rgb(r, g, b):
+    r,g,b = [element if element <= 255 else 255 for element in (r,g,b)]
+    r,g,b = [element if element >= 0 else 0 for element in (r,g,b)]
+    return ''.join([hex(element)[2:].upper().zfill(2) for element in (r,g,b)])
+
+print(rgb(255,255,300))
+print(rgb(1,2,3))
+print(rgb(0,0,0))

[6 kyu]Linear Regression of Y on X.py

@@ -0,0 +1,18 @@
+def regressionLine(x, y):
+    sumSquareX = sum([n**2 for n in x])
+    sumSquareY = sum([n**2 for n in y])
+    sumX = sum(x)
+    sumY = sum(y)
+    sumXY = sum([X*Y for X,Y in zip(x,y)])
+    a = ((sumSquareX*sumY) - (sumX*sumXY)) / float(((len(x) * sumSquareX) - sumX**2))
+    b = ((len(x)*sumXY) - (sumX*sumY)) / float(((len(x)*sumSquareX) - sumX**2))
+    a = round(a,4)
+    b = round(b,4)
+    return a,b
+    
+
+
+print(regressionLine([25,30,35,40,45,50], [78,70,65,58,48,42]))
+#(114.381, -1.4457)
+#a =  [(Σx²)(Σy) - (Σx)(Σxy)]  /  [n(Σx²) - (Σx)²]
+#b =  [n(Σxy) - (Σx)(Σy)] / [n(Σx²) - (Σx)²]

[beta]Mysterious function.py

@@ -0,0 +1,4 @@
+def get_num(n):
+    return sum([2 if c == '8' else 1 for c in str(n) if c in ('0','6','8','9')])
+        
+print(get_num(300))

[leetcode]Add Binary

@@ -0,0 +1,6 @@
+class Solution:
+    # @param {string} a
+    # @param {string} b
+    # @return {string}
+    def addBinary(self, a, b):
+        

[leetcode]Add Binary.py

@@ -0,0 +1,11 @@
+class Solution:
+    # @param {string} a
+    # @param {string} b
+    # @return {string}
+    def addBinary(self, a, b):
+        def binToDecimal(string):
+            return sum([int(n) * (2**i) for i,n in enumerate(reversed(string),0)])
+        return bin(binToDecimal(a) + binToDecimal(b))[2:]
+
+test = Solution()
+print(test.addBinary('1','11'))

[leetcode]Excel Sheet Column Title.py

@@ -0,0 +1,18 @@
+class Solution:
+    # @param {integer} n
+    # @return {string}
+    def convertToTitle(self, n):
+        times = 0
+        res = []
+        while n >= 27:
+            res.append(n % 27)
+            n %= 27
+            times += 1
+            if times == 10000:
+                break
+        res.append(n)
+        return res
+
+test = Solution()
+for i in range(24,30):
+    print(test.convertToTitle(i))

test.py

@@ -1,10 +1,6 @@
-def substract7(n):
-	res = [n]
-	while n > 0:
-		x = input('press cotinues')
-		n -= 7
-		print(n)
-
-print(substract7(200))
-
-b = 3
+if True:
+    print('a')
+    print('a')
+    print('a')
+    print('a')
+