View Compilation Error

0_0_17445388_32301.cpp: In function 'int h()':
0_0_17445388_32301.cpp:27:13: error: 'j' was not declared in this scope
   mbx=(a[i][j-1)/3+;
             ^
0_0_17445388_32301.cpp:27:16: error: expected ']' before ')' token
   mbx=(a[i][j-1)/3+;
                ^
0_0_17445388_32301.cpp:27:20: error: expected primary-expression before ';' token
   mbx=(a[i][j-1)/3+;
                    ^