View Compilation Error

0_0_38807268_8422.cpp: In function 'int main()':
0_0_38807268_8422.cpp:139:46: error: invalid operands of types 'int' and 'std::ios_base&(std::ios_base&)' to binary 'operator-'
  139 |             upper_right[point[i].idx]=n-i-num-right[point[i].hx]-left[point[i].hy];
      |                                       ~~~~~~~^~~~~~~~~~~~~~~~~~~
      |                                          |                     |
      |                                          int                   std::ios_base&(std::ios_base&)
0_0_38807268_8422.cpp:140:29: error: lvalue required as increment operand
  140 |             left[point[i].hy]++;
      |                             ^
0_0_38807268_8422.cpp:141:30: error: lvalue required as increment operand
  141 |             right[point[i].hx]++;
      |                              ^