2016 annual Ali intern online written test add-on title 3

#include <iostream>using namespacestd;inta[ +];intWaiting =1;intMain () {inttemp =0; inti =0;  while(cin>>temp) {A[temp]=1; if(temp = =waiting) {cout<<waiting;  for(i = waiting +1; A[i] = =1; i++) {cout<<","<<i; } cout<<Endl; Waiting=i; } } return 0;}

Ali of these additional questions for me is a bit difficult, I have been struggling with the first problem, the last topic when there is no time.
After handing in the papers carefully thought, this realization should be able to meet the requirements. 

2016 annual Ali intern online written test add-on title 3