Compilare: main.cpp:1:0: warning: ignoring #pragma optimize [-Wunknown-pragmas] #pragma optimize("Ofast") main.cpp: In function 'int32_t main()': main.cpp:41:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<v.size(); j++){ ~^~~~~~~~~ main.cpp:48:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<v.size(); j++){ ~^~~~~~~~~