Compilare: main.cpp: In function 'int find_min(int, int, const std::vector<std::vector<int> >&)': main.cpp:29:20: warning: narrowing conversion of 'std::log2<int>(((((int)r) - ((int)l)) + 1))' from '__gnu_cxx::__enable_if<true, double>::__type {aka double}' to 'int' inside { } [-Wnarrowing] int k{std::log2(r - l + 1)}; ~~~~~~~~~^~~~~~~~~~~ main.cpp: In function 'std::vector<std::vector<int> > preprocess_rmq(const std::vector<int>&)': main.cpp:46:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = 1; i + (1 << k) - 1 < in.size(); ++k) ~~~~~~~~~~~~~~~~~^~~~~~~~~~~