/in/foo.cc:1:25: warning: extra tokens at end of #include directive
 #include<iostream>using namespace std;int main() { int a[22]; int i=0; while(true) {  cin>>a[i];  if(a[i]==0)  {   break;  }  i++; } if(i==0) {  cout<<0<<endl;  return 0; } int Left[22]; for(int j=0;j<i;j++) {  int All=0;  int h=1;  int  Left=a[j];  while(true)  {   Left-=h;   if(Left>0)   {     All+=h*h;     h++;   }     else   {    All+=h*(Left+h);    cout<<a[j]<<" "<<All<<endl;    break;   }  } }  return 0;}
                         ^~~~~~~~~
/in/foo.cc:1:9: fatal error: iostream>usin: No such file or directory
 #include<iostream>using namespace std;int main() { int a[22]; int i=0; while(true) {  cin>>a[i];  if(a[i]==0)  {   break;  }  i++; } if(i==0) {  cout<<0<<endl;  return 0; } int Left[22]; for(int j=0;j<i;j++) {  int All=0;  int h=1;  int  Left=a[j];  while(true)  {   Left-=h;   if(Left>0)   {     All+=h*h;     h++;   }     else   {    All+=h*(Left+h);    cout<<a[j]<<" "<<All<<endl;    break;   }  } }  return 0;}
         ^~~~~~~~~~~~~~~
compilation terminated.