View Compilation Error

0_0_39662562_30774.cpp: In function 'int main()':
0_0_39662562_30774.cpp:19:6: error: 'a' was not declared in this scope
   19 |     }a
      |      ^
0_0_39662562_30774.cpp:20:16: error: 't' was not declared in this scope
   20 |    for(int t=1;t<=k;t++)
      |                ^