error: expected ';' at end of declaration vector<int> sequence { 4, 5, 1, 3, 2 };

This error usually occurs when there is a missing semicolon at the end of a declaration. In your case, you can solve this error by adding a semicolon at the end of the line of code where the error occurs. Here's an example:

vector<int> sequence { 4, 5, 1, 3, 2 }; // add semicolon at the end

This should fix the error.