View Compilation Error

0_0_39436096_10941.cpp: In function 'int main()':
0_0_39436096_10941.cpp:21:53: error: 'aj' was not declared in this scope; did you mean 'j'?
   21 |                         else dp[i][j] = max(dp[i-1][aj],dp[i][j-1]);
      |                                                     ^~
      |                                                     j