Compilare: main.cpp: In function 'int main()': main.cpp:31:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<std::pair<int, char> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | for(level = 0; level < vsemnal.size(); level++) | ~~~~~~^~~~~~~~~~~~~~~~ main.cpp:41:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 41 | for(j = 0; j < vsemnal[vsemnal.size() - 1].size(); j++) | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~