kitchen.cpp: In function 'int main()':
kitchen.cpp:30:42: warning: comparison of integer expressions of different signedness: 'std::set<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
30 | while(!x.empty() && track.size() < k && a[i] > 0){
| ~~~~~~~~~~~~~^~~
kitchen.cpp:43:25: warning: comparison of integer expressions of different signedness: 'std::set<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
43 | if(track.size() < k){
| ~~~~~~~~~~~~~^~~
kitchen.cpp:47:26: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int>, std::allocator<std::pair<long long int, long long int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
47 | for(int j = 0; j < used.size(); j++){
| ~~^~~~~~~~~~~~~