Compilare: main.cpp: In function 'void solve()': main.cpp:52:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(id1<type[i].size() && type[i][id1].first<=x+1) ~~~^~~~~~~~~~~~~~~ main.cpp:58:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(id2<type[j].size() && type[j][id2].first<=x+1) ~~~^~~~~~~~~~~~~~~