Compilare: user.cpp: In function ‘int main()’: user.cpp:116:31: warning: format ‘%u’ expects argument of type ‘unsigned int*’, but argument 3 has type ‘long long unsigned int*’ [-Wformat=] fscanf(fin, "%ull", &k); ^ user.cpp:55:33: 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:116:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%ull", &k); ^