View Compilation Error

0_0_33534319_30066.cpp: In function 'void update(int&, int, int, int, int, int, long long int)':
0_0_33534319_30066.cpp:41:2: error: 'else' without a previous 'if'
  else { update(tree[now].l, tree[pas].l, ql, mid, l, mid, val), update(tree[now].r, tree[pas].r, mid + 1, qr, mid + 1, r, val); }
  ^