View Compilation Error

0_0_36486488_4975.cpp: In function 'int main()':
0_0_36486488_4975.cpp:61:3: error: 'll' was not declared in this scope
   ll ans=0;
   ^
0_0_36486488_4975.cpp:64:3: error: 'ans' was not declared in this scope
   ans+=tree[0].sum[1];
   ^