Compilare: main.cpp: In function 'int min_cost_flow(int, int)': main.cpp:43:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Edge>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 43 | for (int i = 0;i < network[u].size(); ++i) { | ~~^~~~~~~~~~~~~~~~~~~ main.cpp:45:21: warning: unused variable 'residual' [-Wunused-variable] 45 | int residual = network[u][i].residual; | ^~~~~~~~