/in/foo.cc: In function 'bool li(long int, long int)':
/in/foo.cc:8:12: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
     if(j==x&&k==y||j==0&&k==0) return 1;
        ~~~~^~~~~~
/in/foo.cc:2:36: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
 #define L(j,k,x,y) (j==x+1||j==x-1)&&(k==y+2||k==y-2)
                    ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~
/in/foo.cc:9:8: note: in expansion of macro 'L'
     if(L(j,k,x,y)||L(k,j,y,x)) return 1;
        ^