5 Line solution
Code\n\nclass Solution:\n    def decodeCiphertext(self, s: str, R: int) -> str:\n        if R == 1: return s\n        C = len(s)//R; res = ""\n        for j in 
# Code\n```\nclass Solution:\n    def decodeCiphertext(self, s: str, R: int) -> str:\n        if R == 1: return s\n        C = len(s)//R; res = ""\n        for j in range(C-R+2):\n            res += s[j::C+1]\n        return res.rstrip()\n```
['Python3']