View Compilation Error

0_0_39709819_17516.cpp: In function 'bool f(ll)':
0_0_39709819_17516.cpp:19:20: error: 'A' was not declared in this scope
   19 |     for(int i=1;i<=A;i++){
      |                    ^
0_0_39709819_17516.cpp:23:20: error: 'B' was not declared in this scope
   23 |     for(int i=1;i<=B;i++){
      |                    ^