View Compilation Error

0_0_37853395_21556.cpp: In function 'int main()':
0_0_37853395_21556.cpp:38:15: error: 'e' was not declared in this scope
   int sumax = e + l + r + b - max(0, b - e - 1);
               ^
0_0_37853395_21556.cpp:38:19: error: 'l' was not declared in this scope
   int sumax = e + l + r + b - max(0, b - e - 1);
                   ^
0_0_37853395_21556.cpp:38:23: error: 'r' was not declared in this scope
   int sumax = e + l + r + b - max(0, b - e - 1);
                       ^
0_0_37853395_21556.cpp:38:27: error: 'b' was not declared in this scope
   int sumax = e + l + r + b - max(0, b - e - 1);
                           ^