Compilare: user.cpp: In function ‘int bfsc(int, int, int)’: user.cpp:45:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int bfsv(int, int, int, int)’: user.cpp:59:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:84:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v.size(); i++) { ^ user.cpp:102:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < graph.size(); i++) { ^ user.cpp:119:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < ans.size(); i++) ^