49>lineEncoding

Given a string, return its encoding defined as follows: First, the string is divided into the least possible number of disjoint substrings consisting of identical characters for example, "aabbbc" is divided into ["aa", "bbb", "c"] Next, each substring with length greater than one is replaced with a concatenation of its length and the repeating character for example, substring "bbb" is replaced by "3b" Finally, all the new strings are concatenated together in the same order and a new string is returned. Example For s = "aabbbc", the output should be lineEncoding(s) = "2a3bc".

code>>

std::string lineEncoding(std::string s) {

std::string r = "";

int count = 1;

for (int i = 1; i < s.length(); i++)

{

if (s[i] == s[i - 1])

count++;

else

{

if (count > 1)

{

r += std::to_string(count) + s[i - 1];

count = 1;

}

else

r += s[i - 1];

}

}

return  count > 1 ? r += std::to_string(count) + s[s.length() - 1] : r += s[s.length() - 1];

}