View Compilation Error

0_0_29965523_31577.cpp: In function 'int main()':
0_0_29965523_31577.cpp:59:11: error: 'IO' has not been declared
     int t;IO::read(t);
           ^
0_0_29965523_31577.cpp:62:15: error: 'cin' was not declared in this scope
         int n;cin>>n;
               ^
0_0_29965523_31577.cpp:83:13: error: 'cout' was not declared in this scope
             cout<<and<<' ';
             ^
0_0_29965523_31577.cpp:83:22: error: expected identifier before '<<' token
             cout<<and<<' ';
                      ^
0_0_29965523_31577.cpp:86:9: error: 'cout' was not declared in this scope
         cout<<endl;
         ^
0_0_29965523_31577.cpp:86:15: error: 'endl' was not declared in this scope
         cout<<endl;
               ^