art.cpp: In function 'void solve(int)':
art.cpp:28:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
28 | for(int j=0;j<v.size();j++)
| ~^~~~~~~~~
art.cpp:39:28: warning: 'pos2' may be used uninitialized in this function [-Wmaybe-uninitialized]
39 | swap(b[pos1],b[pos2]);
| ^
art.cpp:39:20: warning: 'pos1' may be used uninitialized in this function [-Wmaybe-uninitialized]
39 | swap(b[pos1],b[pos2]);
| ^
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) {
| ~~~~~~~~~^~~~