View Compilation Error

0_0_39265936_23546.cpp: In function 'int main()':
0_0_39265936_23546.cpp:51:45: error: 'a' was not declared in this scope
   51 |                                 if(!check(i,a[j][0],a[j][1],a[j][2]))   guess=false;
      |                                             ^
0_0_39265936_23546.cpp: At global scope:
0_0_39265936_23546.cpp:61:9: error: expected unqualified-id before 'return'
   61 |         return 0;
      |         ^~~~~~
0_0_39265936_23546.cpp:62:1: error: expected declaration before '}' token
   62 | }
      | ^