Compilare: main.cpp: In function 'void Solve()': main.cpp:34:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'unsigned int'} [-Wsign-compare] 34 | if (pos == s.size()) { | ~~~~^~~~~~~~~~~ main.cpp:55:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'unsigned int'} [-Wsign-compare] 55 | for (int i = 0; i < ans.size(); ++i) { | ~~^~~~~~~~~~~~ main.cpp:48:17: warning: 'last' may be used uninitialized in this function [-Wmaybe-uninitialized] 48 | while (last != -1) { | ~~~~~^~~~~