Compilare: main.cpp: In function 'int query(int, int)': main.cpp:33:9: warning: 'd' may be used uninitialized in this function [-Wmaybe-uninitialized] return d; ^ main.cpp: In function 'int main()': main.cpp:51:27: warning: 'd' may be used uninitialized in this function [-Wmaybe-uninitialized] fout << query(a, b) << '\n'; ^~~~