View Compilation Error

0_0_15833769_32226.cpp:6:1: error: 'll' does not name a type
 ll Euler(ll n)
 ^
0_0_15833769_32226.cpp: In function 'int main()':
0_0_15833769_32226.cpp:22:5: error: 'll' was not declared in this scope
     ll n , x ;
     ^
0_0_15833769_32226.cpp:23:31: error: 'n' was not declared in this scope
     while(~scanf("%lld%lld" ,&n , &x)){
                               ^
0_0_15833769_32226.cpp:23:36: error: 'x' was not declared in this scope
     while(~scanf("%lld%lld" ,&n , &x)){
                                    ^
0_0_15833769_32226.cpp:24:38: error: 'Euler' was not declared in this scope
         printf("%lld\n" , Euler(n+x+1)) ;
                                      ^