Compilare: user.cpp: In function ‘int query(int, int)’: user.cpp:58:16: warning: ‘ansR.Node::val’ may be used uninitialized in this function [-Wmaybe-uninitialized] return ans.val; ^ user.cpp:28:33: warning: ‘ansR.Node::dr’ may be used uninitialized in this function [-Wmaybe-uninitialized] res.val = (a.val * pow[b.dr - b.st + 1] + ^ user.cpp:45:16: note: ‘ansR.Node::dr’ was declared here Node ansL, ansR; ^