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class Solution {
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 public:
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  vector<string> removeComments(vector<string> &source) {
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    string cur = "";
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    vector<string> out;
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    bool comm = false; // it will help us see whether comment is active or not
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    for (string s : source) {
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      for (int j = 0; j < s.size(); j++) {
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        // that means a comment is started
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        if (!comm && s[j] == '/' && s[j + 1] == '*') {
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          comm = true;
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          j++;
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        }
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        // what if a // <- is present, then full line is not read & break
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        // also make sure it is outside comments
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        else if (!comm && s[j] == '/' && s[j + 1] == '/')
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          break;
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        // check if a comment is completed
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        else if (comm && s[j] == '*' && s[j + 1] == '/') {
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          comm = false;
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          j++;
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        }
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        // or else it is a valid code
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        else if (!comm)
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          cur += s[j];
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      }
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      // now check if it's a comment or not and its not blank (because comments
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      // are blank lines) and add it to output
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      if (!comm && cur.size()) {
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        out.push_back(cur);
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        cur = "";
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      }
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    }
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    return out;
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  }
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};