Problem	exam
User	Tianrui
Submission Time	2025-10-22 14:34:24
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

exam.cpp: In function ‘int main()’:
exam.cpp:2:3: error: ‘ios_base’ has not been declared
2 | ios_base::sync_with_stdio(0);
| ^~~~~~~~
exam.cpp:3:3: error: ‘cin’ was not declared in this scope
3 | cin.tie(0);
| ^~~
exam.cpp:7:5: error: ‘cout’ was not declared in this scope
7 | cout << "Hello World";
| ^~~~
exam.cpp:9:5: error: ‘cout’ was not declared in this scope
9 | cout << A*B;
| ^~~~