Accepted
/in/foo.cc: In function 'void splay(int, int&)':
/in/foo.cc:25:14: warning: suggest parentheses around comparison in operand of '^' [-Wparentheses]
if(s[a][0]==x^s[b][0]==a) rotate(x,k);
~~~~~~~^~~
/in/foo.cc: In function 'void splay(int, int&)':
/in/foo.cc:25:14: warning: suggest parentheses around comparison in operand of '^' [-Wparentheses]
if(s[a][0]==x^s[b][0]==a) rotate(x,k);
~~~~~~~^~~
