art.cpp: In function 'void solve(int)':
art.cpp:10:13: warning: variable 'a' set but not used [-Wunused-but-set-variable]
10 | int a, b;
| ^
art.cpp:10:16: warning: unused variable 'b' [-Wunused-variable]
10 | int a, b;
| ^
interface.cpp: In function 'int publish(std::vector<int>)':
interface.cpp:20:17: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
20 | if(v.size() != N) {
| ~~~~~~~~~^~~~
interface.cpp: In function 'void answer(std::vector<int>)':
interface.cpp:36:17: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
36 | if(v.size() != N) {
| ~~~~~~~~~^~~~