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  yang(Python)

  

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  2025-06-17 来自 北京

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  复仇者_shazi一只

  

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  #include<bits/stdc++.h>

  #ifndef _GLIBCXX_NO_ASSERT

  #include<cassert>

  #endif

  #include<cctype>

  #include<cerrno>

  #include<cfloat>

  #include<ciso646>

  #include<climits>

  #include<clocale>

  #include<cmath>

  #include<csetjmp>

  #include<csignal>

  #include<cstdarg>

  #include<cstddef>

  #include<cstdio>

  #include<cstdlib>

  #include<cstring>

  #include<ctime>

  #include<ccomplex>

  #include<cfenv>

  #include<cinttypes>

  #include<cstdalign>

  #include<cstdbool>

  #include<cstdint>

  #include<ctgmath>

  #include<cwchar>

  #include<cwctype>

  #include<algorithm>

  #include<bitset>

  #include<complex>

  #include<deque>

  #include<exception>

  #include<fstream>

  #include<functional>

  #include<iomanip>

  #include<ios>

  #include<iosfwd>

  #include<iostream>

  #include<istream>

  #include<iterator>

  #include<limits>

  #include<list>

  #include<locale>

  #include<map>

  #include<memory>

  #include<new>

  #include<numeric>

  #include<ostream>

  #include<queue>

  #include<set>

  #include<sstream>

  #include<stack>

  #include<stdexcept>

  #include<streambuf>

  #include<string>

  #include<typeinfo>

  #include<utility>

  #include<valarray>

  #include<vector>

  #include<array>

  #include<atomic>

  #include<chrono>

  #include<condition_variable>

  #include<forward_list>

  #include<future>

  #include<initializer_list>

  #include<mutex>

  #include<random>

  #include<ratio>

  #include<regex>

  #include<scoped_allocator>

  #include<system_error>

  #include<thread>

  #include<tuple>

  #include<typeindex>

  #include<type_traits>

  #include<unordered_map>

  #include<unordered_set>

  /*
  上面的头文件只有万能头需要用
  */

  using namespace std;

  int main()

  {

  set<int> se;
  
  int n;
  
  cin>>n;
  
  for(int i=1;i<=n;i++)
      
  {
      
  	int t;
      
  	cin>>t;
      
  	se.insert(t);
      
  }
  
  cout<<se.size();
  
  cout<<endl;
  
  for(auto x:se)
      
      cout<<x<<" ";
  

  }

  2025-06-17 来自 上海

  0