Compilare: main.cpp: In function 'int main()': main.cpp:51:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 51 | while (head < q.size()) { | ~~~~~^~~~~~~~~~ main.cpp:85:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 85 | while (head < q.size()) { | ~~~~~^~~~~~~~~~ main.cpp:123:28: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 123 | if (all.size() == p) { | ~~~~~~~~~~~^~~~ main.cpp:129:39: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 129 | for (int j = 1; j < v.size(); ++j) { | ~~^~~~~~~~~~