Compilare: main.cpp: In function 'int main()': main.cpp:63:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 63 | for(int i = 0; i < biconexe.size(); i++) { | ~~^~~~~~~~~~~~~~~~~ main.cpp:64:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 64 | for(int j = 0; j < biconexe[i].size(); j++) | ~~^~~~~~~~~~~~~~~~~~~~