Compilare: main.cpp: In instantiation of 'RangeMinimumQuery<T, F>::RangeMinimumQuery(int, F&) [with T = int; F = int(int, int)]': main.cpp:54:61: required from here main.cpp:40:8: warning: 'RangeMinimumQuery<int, int(int, int)>::f' will be initialized after [-Wreorder] F &f; ^ main.cpp:39:29: warning: 'std::vector<std::vector<int>, std::allocator<std::vector<int> > > RangeMinimumQuery<int, int(int, int)>::table' [-Wreorder] vector < vector < T > > table; ^~~~~ main.cpp:8:5: warning: when initialized here [-Wreorder] RangeMinimumQuery (int _N, F &_f): ^~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:49:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("rmq.in", "r", stdin); ^ main.cpp:50:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("rmq.out", "w", stdout); ^ main.cpp:53:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d", &N, &M); ^ main.cpp:57:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &x); ^ main.cpp:63:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d", &l, &r); ^