View Compilation Error

0_0_21430010_9076.cpp:4:1: error: 'LL' does not name a type
 LL cal(int a,LL b,int mod)
 ^
0_0_21430010_9076.cpp: In function 'int main()':
0_0_21430010_9076.cpp:27:13: error: 'LL' was not declared in this scope
             LL ans=(cal(10,m,9*k)-1+9*k)%(9*k);
             ^
0_0_21430010_9076.cpp:28:13: error: 'ans' was not declared in this scope
             ans=ans*x/9;
             ^