View Compilation Error

0_0_35771636_2211.cpp: In function 'int main()':
0_0_35771636_2211.cpp:34:3: error: 'l1' was not declared in this scope
   l1 = str1.size();
   ^
0_0_35771636_2211.cpp:36:3: error: 'l2' was not declared in this scope
   l2 = str2.size();
   ^
0_0_35771636_2211.cpp:52:6: error: expected ';' before 'else'
      else dp[i][j] = max(dp[i-1][j],dp[i][j-1]);
      ^