Compilare: user.cpp: In function ‘void solve(int)’: user.cpp:169:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = d; i < gr[node].size(); ++ i){ ^ user.cpp:184:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < gr[node].size(); ++ i){ ^ user.cpp:191:65: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(heaviest == -1) for(int i = 0; i < statii[node].size(); ++ i){ Tr->add(Tr->root[node], statii[node][i]); ++heavy[node];} ^ user.cpp:195:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < gr[node].size(); ++ i){ ^