From 246512a2c2bdd6c9bc0380493368834187fa9526 Mon Sep 17 00:00:00 2001 From: Jack Sangdahl Date: Mon, 12 May 2025 19:31:20 -0600 Subject: 3335. total characters in string after transformation 1 --- total_char_str_transform1.py | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 total_char_str_transform1.py (limited to 'total_char_str_transform1.py') diff --git a/total_char_str_transform1.py b/total_char_str_transform1.py new file mode 100644 index 0000000..d4b2471 --- /dev/null +++ b/total_char_str_transform1.py @@ -0,0 +1,31 @@ +# 3335. Total Characters in String After Transformations I + +""" +you are given a string 's' and an integer 't' representing the number of +transformations to perform. in one transformation, every character in 's' is +replaced according to the following rules: if the character is 'z', replace +it with the string 'ab'. otherwise, replace it with the next character in the +alphabet. return the length of the resulting string after exactly 't' +transformations. since the answer may be very large, return it modulo 10^9 ++ 7. +""" + + +class Solution(object): + def lengthAfterTransformations(self, s, t): + """ + :type s: str + :type t: int + :rtype: int + """ + mod = 10**9 + 7 + dp = [1] * 26 + [0] * 100100 + for i in range(26, 100100): + dp[i] = (dp[i - 26] + dp[i - 26 + 1]) % mod + return sum(dp[ord(c) - ord("a") + t] for c in s) % mod + + +if __name__ == "__main__": + obj = Solution() + print(obj.lengthAfterTransformations(s="abcyy", t=2)) + print(obj.lengthAfterTransformations(s="azbk", t=1)) -- cgit v1.2.3