Which Of The Following Correctly Represents The Function To #1759

 int BottomInsert(int x) { if(s.size()!=0) s.push(x); else { int a = s.top(); s.pop(); BottomInsert(x); s.push(a); } } 

 int BottomInsert(int x) { if(s.size()==0) s.push(x); else { int a = s.top(); s.pop(); s.push(a); BottomInsert(x); } } 

 int BottomInsert(int x) { if(s.size()==0) s.push(x); else { int a = s.top(); s.pop(); BottomInsert(x); s.push(a); } } 

 int BottomInsert(int x) { if(s.size()==0) s.push(x); else { s.pop(); int a = s.top(); BottomInsert(x); s.push(a); } }