Program to check one string can be converted to other by shifting characters clockwise in Python

Suppose we have two strings p and q, and also have a number r, we have to check whether p can be converted to q by shifting some characters clockwise at most r times. So, as an example, "c" can be turned into "e" using 2 clockwise shifts.

So, if the input is like p = "abc", q = "ccc", r = 3, then the output will be True, as we can make "a" into "c" by using 2 clockwise shifts and then convert "b" into "c" by using 1 clockwise shift, for a total of 3 shifts.

To solve this, we will follow these steps −

• if size of a is not same as size of b, then
  • return False
• if k is same as 0 and a is not same as b, then
  • return False
• su:= 0
• for i in range 0 to size of a, do
  • v := ASCII of b[i] - ASCII of a[i]
  • if v>=0, then
    • su := su + v
  • otherwise,
    • su := su + v + 26
  • if su > k, then
    • return False
• return True

Let us see the following implementation to get better understanding −

Example

class Solution:
   def solve(self, a, b, k):
      if len(a) != len(b):
         return False
      if k == 0 and a != b:
         return False
         su=0
         for i in range(len(a)):
            v = ord(b[i])- ord(a[i])
            if v>=0:
               su+=v
            else:
               su+=v+26
            if su>k:
               return False
         return True
ob = Solution()
print(ob.solve("abc", "ccc", 3))

Input

"abc", "ccc", 3

Output

True