Compilare: user.cpp: In function ‘int accesable(int, int)’: user.cpp:11:32: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] return K&((1<<S)-1)^a[x][y]&((1<<S)-1)==((1<<S)-1) && x>0 && y>0 && x<=N && y<=M; ^ user.cpp:11:13: warning: suggest parentheses around arithmetic in operand of ‘^’ [-Wparentheses] return K&((1<<S)-1)^a[x][y]&((1<<S)-1)==((1<<S)-1) && x>0 && y>0 && x<=N && y<=M; ^