Compilare: main.cpp: In function 'int main()': main.cpp:33:18: 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] 33 | for(int j=0;j<cost.size();j++) | ~^~~~~~~~~~~~ main.cpp:56:22: 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] 56 | for(int j=0;j<temp.size();j++) | ~^~~~~~~~~~~~