Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:27:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < arb2[nod].size(); ++ i){ ^ user.cpp:26:9: warning: variable ‘ok’ set but not used [-Wunused-but-set-variable] int ok = 0; ^ user.cpp: In function ‘void solve(short int)’: user.cpp:50:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(short int i = 0; i < arb2[nod].size(); ++ i){ ^ user.cpp: In function ‘void dfs_heap(short int)’: user.cpp:72:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(short int i = 0; i < arb2[nod].size(); ++ i){ ^