Compilare: main.cpp: In function 'int solve(int, int)': main.cpp:36:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int x = 0; x<v[nod].size();++x) ~^~~~~~~~~~~~~~ main.cpp: In function 'int compute(int)': main.cpp:67:14: warning: variable 'ok' set but not used [-Wunused-but-set-variable] bool ok = 1; ^~