View Compilation Error

0_0_28721190_32090.cpp: In function 'int main()':
0_0_28721190_32090.cpp:19:10: error: invalid operands of types 'char [80005]' and 'char [80005]' to binary 'operator+'
     if(a+b<=2*n-dif&&abs(a-b)<=dif)
          ^