text: #include <algorithm>
  #include <cctype>
  #include <deque>
  #include <exception>
  #include <fstream>
  #include <iostream>
  #include <list>
  #include <limits>
  #include <sstream>
  #include <sstream>
  #include <stack>
  #include <string>
  #include <vector>
  #include <iomanip>
  #include <ostream>
  
  
  