You are given a string 's' and two characters c1 and c2. You can choose any...
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You are given a string 's' and two characters c1 and c2. You can choose any one of the two characters and add it to any position in the string to create a new string (exactly once). For example, if s= 'cdaabcacd' and c1= 'a' and c2='d', you could create a new string 'cdaabdcacd' or 'acdaabcacd' etc.(note that the character can be added to the beginning or the end of the string 's'). Your job is to find the maximum number of times string 'c1c2' can occur as a sub- string of the modified string using Dynamic Programming. The substring can be contiguous or non-contiguous (i.e for a string 'abcdef ab,ce', 'ef, be all are valid substrings). Assume all characters and string s consists of lowercase english letters. Example: s="bcedecd", c1 = 'b', c2= 'd' output: 4 Example: s="bcedecd", c1 = 'b', c2= 'd' output: 4 Explanation: We can form a modified string by adding c1 in s such that the modified string is "bcbedecd", the substring 'c1c2' ('bd') occurs 4 times in the modified string as: ["bcbedecd","bcbedecd","bcbedecd","bcbedecd"] Any other modified string will have the occurrence of 'c1c2' 4 times or less. Time complexity constraint: O(n) where n is the length of string s.Space complexity <= O(n) You are given a string 's' and two characters c1 and c2. You can choose any one of the two characters and add it to any position in the string to create a new string (exactly once). For example, if s= 'cdaabcacd' and c1= 'a' and c2='d', you could create a new string 'cdaabdcacd' or 'acdaabcacd' etc.(note that the character can be added to the beginning or the end of the string 's'). Your job is to find the maximum number of times string 'c1c2' can occur as a sub- string of the modified string using Dynamic Programming. The substring can be contiguous or non-contiguous (i.e for a string 'abcdef ab,ce', 'ef, be all are valid substrings). Assume all characters and string s consists of lowercase english letters. Example: s="bcedecd", c1 = 'b', c2= 'd' output: 4 Example: s="bcedecd", c1 = 'b', c2= 'd' output: 4 Explanation: We can form a modified string by adding c1 in s such that the modified string is "bcbedecd", the substring 'c1c2' ('bd') occurs 4 times in the modified string as: ["bcbedecd","bcbedecd","bcbedecd","bcbedecd"] Any other modified string will have the occurrence of 'c1c2' 4 times or less. Time complexity constraint: O(n) where n is the length of string s.Space complexity <= O(n)
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The idea is to use dynamic programming Let dpij be the maximum number of times the substring c1c2 ca... View the full answer
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