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include <bits/stdc++.h>

include <algorithm>

include <bitset>    

include <cctype>

include <cerrno>    

include <cfloat>    

include <ciso646>

include <climits>

include <clocale>     

include <cmath>      

include <complex>    

include <csignal>

include <csetjmp>

include <cstdarg>

include <cstddef>

include <cstdio>    

include <cstdlib>   

include <cstring>  

include <ctime>    

include <cwchar>     

include <cwctype>     

include <deque>    

include <exception> 

include <fstream>   

include <functional> 

include <limits>    

include <list>   

include <locale>

include <map>    

include <memory>

include <new>

include <numeric>

include <iomanip>  

include <ios>     

include <iosfwd>  

include <iostream>  

include <istream>  

include <iterator>

include <ostream>  

include <queue>    

include <set>   

include <sstream>  

include <stack>    

include <stdexcept>  

include <streambuf>  

include <string>    

include <typeinfo>

include <utility>

include <valarray>

include <vector>