Compilare: user.cpp: In function ‘int Flow::MaxFlowMinCost()’: user.cpp:54:23: warning: unused variable ‘cap’ [-Wunused-variable] int cost = 0, cap = 0; ^~~ user.cpp: In function ‘int main()’: user.cpp:117:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < adia[x].size(); i++) { ~~^~~~~~~~~~~~~~~~ user.cpp:122:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < arm.size(); i++) { ~~^~~~~~~~~~~~