/in/foo.cc: In function 'void splay(int&, int, int)':
/in/foo.cc:48:9: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses]
       if(z!=anc)
         ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:179:12: warning: unused variable 'k' [-Wunused-variable]
    int i,j,k,t;
            ^