#include<stdio.h>
const n=10;
int a[n]={10,8,2,7,1,1,2,7,1,1};
main()
{int D=3, G=4, p=0, k=0, Suma=0;
 while(((Suma<D)||(G<Suma))&&(k<n-1))
 {if(Suma<G)Suma+=a[p++];
  if(D<Suma)Suma-=a[k++];
 }
 printf("od %d do %d",k,p-1);
}