Compilare: main.cpp: In function 'int main()': main.cpp:29:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | for(int i=0;i<gr.size();i++) | ~^~~~~~~~~~ main.cpp:42:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 42 | for(int i=0;i<ras.size();i++) | ~^~~~~~~~~~~