Compilare: main.cpp: In function 'int main()': main.cpp:54:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<subquest>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 54 | while (qid < requests.size() && i == requests[qid].lim) | ~~~~^~~~~~~~~~~~~~~~~ main.cpp:62:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<subquest>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 62 | if (qid == requests.size()) break; | ~~~~^~~~~~~~~~~~~~~~~~