Compilare: user.cpp: In member function ‘int Treapuri::random()’: user.cpp:34:29: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] return ((rand()<<15 + rand())%MOD + MOD)%MOD + 1; ^ user.cpp: In function ‘void sterge(int)’: user.cpp:160:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < trebuie_stergere.size(); ++ i){ ^ user.cpp: In function ‘void solve(int)’: user.cpp:179:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = d; i < gr[node].size(); ++ i){ ^ user.cpp:194:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < gr[node].size(); ++ i){ ^ user.cpp:201:65: 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:205:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < gr[node].size(); ++ i){ ^ user.cpp:212:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < statii[node].size(); ++ i){ ^