Compilare: user.cpp: In function ‘int bfs(int)’: user.cpp:25:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < graph[element].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:44:26: warning: variable ‘second_try’ set but not used [-Wunused-but-set-variable] int x, i, y, first_try, second_try; ^ user.cpp: In function ‘int bfs(int)’: user.cpp:35:19: warning: ‘element’ may be used uninitialized in this function [-Wmaybe-uninitialized] dm = cost[element]; ^