Compilare: user.cpp: In function ‘int dfs(int, int)’: user.cpp:23:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<q[nod].size();i++){ ^ user.cpp: In function ‘int stramos(int, int)’: user.cpp:31:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<nivel[niv[x]-p].size();i++){ ^ user.cpp:34:1: warning: control reaches end of non-void function [-Wreturn-type] } ^