candle problem

whats wrong with code,can someone give me a testcase for which it does not work

#include<stdio.h>
#include<stdlib.h>
 
int t,p,c[10],i,flag=0;
 int cnt=0,num;
int main()
{
 
 scanf("%d",&t);
 while(t)
 {
  for( i=0;i<10;i++)
  {
      scanf("%d",&c[i]);
  }
  num=0;
  flag=0;
  num=num*10 + getsmallest(1);
  while(flag==0)
  {
      num=num*10 + getsmallest(0);
  }
  printf("%d\n",num);
  t--;
  }
 return 0;
}
 
int getsmallest(int i)
{
    int index,m=9;
    for(;i<10;i++)
    {
        if(c[i]<m)
        {
            index=i;
            m=c[i];
        }
    }
    if(m==0)
        flag=1;
     else
        c[index]--;
    return index;
}``
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