View Compilation Error

0_0_21323239_7178.cpp: In function 'void solve(ll)':
0_0_21323239_7178.cpp:72:24: error: 'prllf' was not declared in this scope
     prllf("%lld\n", ans);
                        ^
0_0_21323239_7178.cpp: At global scope:
0_0_21323239_7178.cpp:74:9: error: '::main' must return 'int'
 ll main()
         ^