Problem	helloworld
User	yikai
Submission Time	2026-02-11 17:57:20
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

helloworld.cpp: In function ‘int main()’:
helloworld.cpp:3:6: error: ‘cout’ was not declared in this scope
3 | std:cout<<"Hello world"<<std::endl;
| ^~~~