View Compilation Error

0_0_25373218_29482.cpp:2:1: error: 'longlong' does not name a type
 longlong cater(int i)
 ^
0_0_25373218_29482.cpp: In function 'int main()':
0_0_25373218_29482.cpp:13:32: error: 'cater' was not declared in this scope
         printf("%lld\n",cater(m));
                                ^