View Compilation Error

0_0_33984873_10599.cpp: In function 'int main()':
0_0_33984873_10599.cpp:18:21: error: invalid types 'int[int]' for array subscript
       a[la-1-i]=la[i]-'0';
                     ^
0_0_33984873_10599.cpp:21:27: error: invalid types 'int[int]' for array subscript
             b[lb-1-i]=lb[i]-'0';
                           ^