Compilare: user.cpp: In function 'void upd(int, int, int, int)': user.cpp:24: warning: 'M' may be used uninitialized in this function user.cpp:24: warning: 'm' may be used uninitialized in this function user.cpp: In function 'arb query(int, int, int, int, int)': user.cpp:51: warning: 'x.arb::m' may be used uninitialized in this function user.cpp:51: warning: 'x.arb::M' may be used uninitialized in this function user.cpp:51: warning: 'y.arb::m' may be used uninitialized in this function user.cpp:51: warning: 'y.arb::M' may be used uninitialized in this function user.cpp:56: warning: 'M' may be used uninitialized in this function user.cpp:56: warning: 'm' may be used uninitialized in this function