View Compilation Error

0_0_36281603_2382.cpp:106:9: error: '::main' must return 'int'
 ll main() {
         ^
0_0_36281603_2382.cpp: In function 'int main()':
0_0_36281603_2382.cpp:133:22: error: 'prllf' was not declared in this scope
   prllf("%lld\n", ans);
                      ^