[LeetCode] Reverse Words in a String
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void reverseWords(string &s) {int word_beg = 0, word_end = s.length()-1;string new_s;int i = s.length()-1;while (i >= 0){while (i >= 0 && s[i] == ' '){i--;}word_end = i;while (i >= 0 && s[i] != ' '){i--;}word_beg = i+1;if (word_beg <= word_end){new_s += s.substr(word_beg, word_end-word_beg+1) + ' ';}}s = new_s.substr(0, new_s.length()-1);}
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