problema platii unei sume greedy

#include<fstream>
#include<iostream>
using namespace std;
ifstream f("e:\\info\\greedy\\suma.txt");
int  n,s,v[20];

void citire()
{f>>n>>s;
 for(int i=1;i<=n;i++)
    f>>v[i];
 f.close();
}

void afis()
{cout<<"bancnote valabile ";
for(int i=1;i<=n;i++)
  cout<<v[i]<<" " ;
}
void sortare()
{int aux;
 for(int i=1;i<n;i++)
   for(int j=i+1;j<=n;j++)
    if(v[i]<v[j])
    {   aux=v[i];
        v[i]=v[j];
        v[j]=aux;
    }
}

void greedy()
{ int i=1;
  while(s!=0)
  { if(s/v[i]!=0)
    {   cout<<s/v[i]<<" bancnote cu valoarea "<<v[i]<<endl;
        s=s%v[i];

    }
        i++;
    if(v[i]==0)
    {   cout<<"nu mai exista solutii";
        break;
    }
  }
}
int main()
{
  citire();
  afis();
  sortare();
  cout<<endl;
  afis();
  cout<<endl;
  greedy();
}4
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