Compilare: main.cpp: In function 'int main()': main.cpp:25:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | for (int i = 0; i + len < rmq[k].size(); i++) | ~~~~~~~~^~~~~~~~~~~~~~~ main.cpp:26:37: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 26 | for (int j = 0; j + len < rmq[k].size(); j++) | ~~~~~~~~^~~~~~~~~~~~~~~