View Compilation Error

0_0_16368741_3388.cpp: In function 'int main()':
0_0_16368741_3388.cpp:74:31: error: 'prlong' was not declared in this scope
   if(0<=ans-sum&&ans-sum<sum) prlong longf("%lld\n",ans-sum);
                               ^
0_0_16368741_3388.cpp:75:8: error: 'prlong' was not declared in this scope
   else prlong longf("impossible\n");
        ^