Compilare: main.cpp: In function 'void add(int, int, int&)': main.cpp:32:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<Upd[*S[p].begin()].size(); i++) ~^~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:35:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<Upd[nod].size(); i++) ~^~~~~~~~~~~~~~~~ main.cpp:38:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<Upd[*S[p].begin()].size(); i++) ~^~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:43:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<Upd[*S[p].begin()].size(); i++) ~^~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:46:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<Upd[nod].size(); i++) ~^~~~~~~~~~~~~~~~ main.cpp:55:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<Upd[*dr].size(); i++) ~^~~~~~~~~~~~~~~~ main.cpp:58:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<Upd[nod].size(); i++) ~^~~~~~~~~~~~~~~~ main.cpp:61:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<Upd[*dr].size(); i++) ~^~~~~~~~~~~~~~~~