Compilare: user.cpp: In function ‘void Update_Sons(int, int, int)’: user.cpp:31:66: warning: operation on ‘arb[fiu[1]].std::pair<int, std::pair<int, int> >::second.std::pair<int, int>::second’ may be undefined [-Wsequence-point] all(fiu[1]) = arb[fiu[1]].b = arb[fiu[1]].c = right - mid; ^ user.cpp:31:66: warning: operation on ‘arb[fiu[1]].std::pair<int, std::pair<int, int> >::second.std::pair<int, int>::first’ may be undefined [-Wsequence-point] user.cpp: In function ‘void Update(int, int, int, int, int, bool)’: user.cpp:41:12: warning: suggest parentheses around comparison in operand of ‘|’ [-Wparentheses] if (lo > right | hi < left) ^