Compilare: user.cpp: In function ‘void solve(int)’: user.cpp:215:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = d; i<graf[nod].size(); ++i) ^ user.cpp:230:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i<graf[nod].size(); ++i) ^ user.cpp:247:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i<graf[nod].size(); ++i) ^