added a folder(1600-1700) and 1652.py

Author: 224apps

1600-1700/1652.py

@@ -0,0 +1,55 @@
+'''
+You have a bomb to defuse, and your time is running out! Your informer will provide you with a circular array code of length of n and a key k.
+
+To decrypt the code, you must replace every number. All the numbers are replaced simultaneously.
+
+If k > 0, replace the ith number with the sum of the next k numbers.
+If k < 0, replace the ith number with the sum of the previous k numbers.
+If k == 0, replace the ith number with 0.
+As code is circular, the next element of code[n-1] is code[0], and the previous element of code[0] is code[n-1].
+
+Given the circular array code and an integer key k, return the decrypted code to defuse the bomb!
+
+Example 1:
+
+Input: code = [5,7,1,4], k = 3
+Output: [12,10,16,13]
+Explanation: Each number is replaced by the sum of the next 3 numbers. The decrypted code is [7+1+4, 1+4+5, 4+5+7, 5+7+1]. Notice that the numbers wrap around.
+Example 2:
+
+Input: code = [1,2,3,4], k = 0
+Output: [0,0,0,0]
+Explanation: When k is zero, the numbers are replaced by 0. 
+Example 3:
+
+Input: code = [2,4,9,3], k = -2
+Output: [12,5,6,13]
+Explanation: The decrypted code is [3+9, 2+3, 4+2, 9+4]. Notice that the numbers wrap around again. If k is negative, the sum is of the previous numbers.
+'''
+class Solution(object):
+    def decrypt(self, code, k):
+        """
+        :type code: List[int]
+        :type k: int
+        :rtype: List[int]
+        """
+        
+        n = len(code)
+        
+        decryptedCode = [0] * n
+        
+        for index in range(n):
+            if k > 0:
+                total = 0
+                for x in range(1, k+1):
+                    total += code[(index + x)%n]
+                decryptedCode[index] = total
+                
+            elif k < 0:
+                total = 0
+                for x in range(1,-k+1):
+                    total += code[(index - x)%n]
+                decryptedCode[index] = total
+            else:
+                decryptedCode[index] = 0
+        return decryptedCode