Compilare: main.cpp: In function 'bool bfs()': main.cpp:34:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | for(int i=0; i<adj_list[nod].size(); i++) | ~^~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:76:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 76 | for(int i=0; i<adj_list[n+m+1].size(); i++) | ~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp:52:9: warning: unused variable 'a' [-Wunused-variable] 52 | int a,b,c,e; | ^