View Compilation Error

0_0_28981820_18571.cpp: In function 'int main()':
0_0_28981820_18571.cpp:16:9: error: 'LL' was not declared in this scope
         LL ans=0;
         ^
0_0_28981820_18571.cpp:48:17: error: 'ans' was not declared in this scope
                 ans+=1ll*a[i]*lnum*rnum;
                 ^
0_0_28981820_18571.cpp:51:25: error: 'ans' was not declared in this scope
         printf("%lld\n",ans);
                         ^