View Compilation Error

0_0_39456856_21787.cpp: In member function 'bool Query::operator<(const Query&) const':
0_0_39456856_21787.cpp:12:26: error: 'blockSize' was not declared in this scope
   12 |         int block1 = l / blockSize;
      |                          ^~~~~~~~~
0_0_39456856_21787.cpp: In function 'int main()':
0_0_39456856_21787.cpp:54:18: error: 'T' was not declared in this scope
   54 |     scanf("%d", &T);
      |                  ^