Compilare: main.cpp: In function 'void build_rmq()': main.cpp:39:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<node>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | for (int i = 0; i < euler.size(); i++) { | ~~^~~~~~~~~~~~~~ main.cpp:43:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<node>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 43 | for (int k = 1; (1 << k) <= euler.size(); k++) { | ~~~~~~~~~^~~~~~~~~~~~~~~ main.cpp:46:42: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<node>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 46 | for (int i = 0; i + current_mask <= euler.size(); i++) { | ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~ main.cpp: In function 'void solve()': main.cpp:91:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<node>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 91 | for (int i = 0; i < euler.size(); i++) { | ~~^~~~~~~~~~~~~~ main.cpp:113:49: warning: 'result_b' may be used uninitialized in this function [-Wmaybe-uninitialized] 113 | out << maximum << " " << result_a << " " << result_b; | ^~~~~~~~ main.cpp:113:42: warning: 'result_a' may be used uninitialized in this function [-Wmaybe-uninitialized] 113 | out << maximum << " " << result_a << " " << result_b; | ^~~