Compilare: user.cpp: In function ‘int acces(int, int)’: user.cpp:13:25: warning: suggest parentheses around comparison in operand of ‘^’ [-Wparentheses] if((x1%2)^(x2%2)==1) ^ user.cpp: In function ‘int main()’: user.cpp:25:33: warning: variable ‘b’ set but not used [-Wunused-but-set-variable] int n,m,t,i,j,p,a[510][510],b[510][510],x,y; ^ user.cpp:45:14: warning: ‘nr’ may be used uninitialized in this function [-Wmaybe-uninitialized] g<<nr; ^