Approved

Thank you ejini战神.
It is updated.

reference solution is comparing to itself ~~

initial solution should return 0;

• missing includes: stdlib, time, and test framework in full tests, test framework in sample tests
• solution setup contains UB, maybe just return 0 would be better?

Please refer to issue above.

Approved. Thank you.

C++ Translation. Please check

Ruby translation kumited -- please check and approve

1. Edit description
2. Add default argument
3. "" is const char* but std::string constructor that takes a const char*

Check it again, please

I'll edit to cr_assert_str_eq

cr_assert_str_leq is not a good function to assert the correct result here.