View Compilation Error

0_0_39556201_19002.cpp: In function 'void solve()':
0_0_39556201_19002.cpp:108:41: error: use of an operand of type 'bool' in 'operator++' is forbidden in C++17
  108 |                 if(check(b[i],C)) ans2[i]++;
      |                                   ~~~~~~^