Compilare: main.cpp: In function 'int32_t main()': main.cpp:113:27: warning: comparison of integer expressions of different signedness: 'int64_t' {aka 'long int'} and 'std::vector<elem>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 113 | for (int j = 1; j < vals[i].size(); j++) | ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int64_t query(int64_t, int64_t)': main.cpp:90:1: warning: control reaches end of non-void function [-Wreturn-type] 90 | } | ^