View Compilation Error

0_0_24908726_240.cpp: In function 'int main()':
0_0_24908726_240.cpp:101:33: error: lvalue required as increment operand
      if(check(P[i][j], P[i][k]) ++ans;
                                 ^
0_0_24908726_240.cpp:101:35: error: expected ')' before 'ans'
      if(check(P[i][j], P[i][k]) ++ans;
                                   ^