View Compilation Error

0_0_23769571_6589.cpp: In function 'void deal(int)':
0_0_23769571_6589.cpp:20:16: error: 'struct ss' has no member named 'l'
  if(tree[root].l==tree[root].r)
                ^
0_0_23769571_6589.cpp:20:30: error: 'struct ss' has no member named 'r'
  if(tree[root].l==tree[root].r)
                              ^
0_0_23769571_6589.cpp:22:18: error: 'struct ss' has no member named 'l'
   ans=tree[root].l;
                  ^