View Compilation Error

0_0_22338541_13964.cpp:2:1: error: 'LL' does not name a type
 LL kc(LL x,LL y)//kuai cheng
 ^
0_0_22338541_13964.cpp:16:1: error: 'LL' does not name a type
 LL km(LL x,LL y)
 ^
0_0_22338541_13964.cpp: In function 'int main()':
0_0_22338541_13964.cpp:34:5: error: 'LL' was not declared in this scope
     LL n;
     ^
0_0_22338541_13964.cpp:39:23: error: 'n' was not declared in this scope
         scanf("%lld",&n);
                       ^
0_0_22338541_13964.cpp:40:31: error: 'km' was not declared in this scope
         printf("%lld\n",km(n,n));
                               ^