src.cpp: In function 'int main()':
src.cpp:24:30: error: invalid types 'long long int [100000000][long long int*]' for array subscript
while(a[i]==a[a+1]);{
^
src.cpp:28:20: error: invalid types 'long long int [100000000][long long int*]' for array subscript
cout<<a[a+1]);
^