View Compilation Error

0_0_36709173_4001.cpp: In function 'void solve()':
0_0_36709173_4001.cpp:114:30: error: 'root' was not declared in this scope
    }else printf("%d\n",query(root[r],root[l-1],1,n,k));
                              ^
0_0_36709173_4001.cpp:117:3: error: 'tr' was not declared in this scope
   tr[i]={0,0,0};
   ^