View Compilation Error

0_0_18089261_17692.cpp:52:1: error: 'LL' does not name a type
 LL quickmod(LL a,LL b,LL m)
 ^
0_0_18089261_17692.cpp: In function 'int main()':
0_0_18089261_17692.cpp:89:3: error: 'LL' was not declared in this scope
   LL ans = quickmod(2LL, n-r, mod) - 1;
   ^
0_0_18089261_17692.cpp:90:20: error: 'ans' was not declared in this scope
   printf("%lld\n", ans);
                    ^