Compilare: user.cpp: In function ‘void sterge(int)’: user.cpp:177:46: 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:196:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = d; i < gr[node].size(); ++ i){ ^ user.cpp:211:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < gr[node].size(); ++ i){ ^ user.cpp:218:66: 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:222:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < gr[node].size(); ++ i){ ^ user.cpp:229:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < statii[node].size(); ++ i){ ^ user.cpp: In function ‘int insertie(int, int)’: user.cpp:174:1: warning: control reaches end of non-void function [-Wreturn-type] } ^