Compilare: main.cpp: In function 'bool bfs()': main.cpp:50:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<nod_flux>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 50 | for(int i = 0; i < v[now].size(); i++) { | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:121:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<nod_flux>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 121 | for(int i = 0; i < v[n].size(); i++) { | ~~^~~~~~~~~~~~~