Compilare: main.cpp: In function 'void solve()': main.cpp:109:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v.size();i++) ~^~~~~~~~~ main.cpp:111:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i==v.size()-1 || nod2[v[i+1]].nr) ~^~~~~~~~~~~~ main.cpp:114:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=i;j<v.size();j++) ~^~~~~~~~~