Compilare: main.cpp: In function 'bool bfsflux(int, int, int*, int)': main.cpp:31:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | for (i = 0; i<v[na].size(); i++) | ~^~~~~~~~~~~~~ main.cpp:16:16: warning: unused variable 'nv' [-Wunused-variable] 16 | int i, na, nv; | ^~ main.cpp: In function 'int main()': main.cpp:67:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 67 | for (i = 0; i<v[n].size(); i++) | ~^~~~~~~~~~~~