View Compilation Error

0_0_30516537_14193.cpp: In function 'void update(int&, int, int, int, int, int)':
0_0_30516537_14193.cpp:48:5: error: 'else' without a previous 'if'
     else if(ul > mid) update(t[rt].r, val, mid + 1, r, ul, ur);
     ^