View Compilation Error

0_0_39388767_1933.cpp:2:20: error: stray '\243' in program
    2 | using namespace std<a3><bb>
      |                    ^~~~
0_0_39388767_1933.cpp:2:21: error: stray '\273' in program
    2 | using namespace std<a3><bb>
      |                        ^~~~
0_0_39388767_1933.cpp:2:20: error: expected ';' before 'long'
    2 | using namespace std；
      |                    ^
      |                    ;
    3 | long long fib(int n) {
      | ~~~~