Compilare: user.cpp: In function ‘void construct(int, int, int)’: user.cpp:78:4: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (x+1<n) ^ user.cpp:86:4: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (x-1>=0) ^ user.cpp:94:4: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (y+1<n) ^ user.cpp:102:4: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (y-1>=0) ^