Compilare: main.cpp: In function 'void marchez_vecini(int, int)': main.cpp:44:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<nod>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 44 | for(i = 0; i < graf[nod].size(); ++i) | ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:67:12: warning: unused variable 'j' [-Wunused-variable] 67 | int i, j, a, b, cost; | ^