View Compilation Error

0_0_29954015_6266.cpp: In function 'int main()':
0_0_29954015_6266.cpp:48:40: error: invalid operands of types 'int [300005]' and 'int [300005]' to binary 'operator+'
   for(int i=1;i<=n;++i)ans=max(f[i]+g[i]-1,ans);
                                        ^