Compilare: user.cpp: In function ‘int main()’: user.cpp:42:20: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if((k&a[ii-1][jj]==0)&&(d[ii-1][jj]==0)&&ii>1) ^ user.cpp:50:20: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if((k&a[ii+1][jj]==0)&&(d[ii+1][jj]==0)&&ii<n) ^ user.cpp:58:20: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if((k&a[ii][jj+1]==0)&&(d[ii][jj+1]==0)&&jj<m) ^ user.cpp:66:20: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if((k&a[ii][jj-1]==0)&&(d[ii][jj-1]==0)&&jj>1) ^ user.cpp:113:15: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if(k&a[i][j]==0) con++; ^ user.cpp:8:18: warning: variable ‘l1’ set but not used [-Wunused-but-set-variable] static int p,n,m,l1,l2,tn,t[2][250000],c1[2][250000],a[510][510],d[510][510],b[510][510],l,c,k,s,con=-1; ^