Compilare: main.cpp: In function 'std::vector<int> solve(std::vector<std::vector<int> >&, std::vector<int>&)': main.cpp:13:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 13 | for(int i = 0;i < q.size();++i) | ~~^~~~~~~~~~ main.cpp:24:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | while(left < tmp.size() && tmp[left] <= v[j].first) | ~~~~~^~~~~~~~~~~~ main.cpp:11:27: warning: unused variable 'c' [-Wunused-variable] 11 | int r = m.size(), c = m[0].size(); | ^ main.cpp: In function 'int main()': main.cpp:46:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 46 | for(int i = 0;i < ans.size();++i) | ~~^~~~~~~~~~~~