Compilare: main.cpp:2:0: warning: ignoring #pragma gcc optimize [-Wunknown-pragmas] #pragma gcc optimize("O3") main.cpp: In function 'int main()': main.cpp:31:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < qu[i].size(); ++j) ~~^~~~~~~~~~~~~~ main.cpp:45:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < ad[i].size(); ++j) ~~^~~~~~~~~~~~~~ main.cpp:48:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < ad[i].size(); ++j) ~~^~~~~~~~~~~~~~