Compilare: main.cpp: In function 'std::pair<int, int> solve()': main.cpp:146:27: warning: suggest parentheses around '+' inside '<<' [-Wparentheses] size = 2 * (1 << size + 1); ~~~~~^~~ main.cpp:156:9: warning: unused variable 'min' [-Wunused-variable] int min; ^~~ main.cpp:157:11: warning: unused variable 'pmin' [-Wunused-variable] point pmin; ^~~~ main.cpp: In function 'int find_min_y(int, int)': main.cpp:170:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0;i < pct.size();++i) { ~~^~~~~~~~~~~~