Compilare: user.cpp: In function ‘int main()’: user.cpp:136:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &n, &m); ^ user.cpp:142:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%lld", &(tmp.value)); ^ user.cpp:149:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%lld%lld%lld", &x, &y, &z); ^ user.cpp: In member function ‘T PhD::SegmentTree<T>::query(long long int, long long int, long long int, long long int*, long long int*) [with T = STMaxLL]’: user.cpp:76:9: warning: control reaches end of non-void function [-Wreturn-type] } ^