View Compilation Error

0_0_15756735_17934.cpp: In function 'int main()':
0_0_15756735_17934.cpp:89:3: error: 'else' without a previous 'if'
   else if((num == 0) || (cmp(ret[0].x-ret[1].x) == 0 && cmp(ret[0].y-ret[1].y) == 0))
   ^