SEAVOTE: after observing the question,

```
B1-1<A1<=B1
B2-1<A2<=B2
B3-1<A3<=B3
........
........
Bn-1<An<=Bn
n=>Total number of elements.
Summing(As we do in 10th standard :) :) )
I think there is no need of writting pseudo-code for sum=B1+B2+...+Bn :)
sum-n<100(given)<=sum
-n<100-sum<=0
This condition is equivalent to ( 100+n>sum) && (sum>=100) ............(1)
Now=>so called PITFALL for this question :(
Bi can be zero But Ai can't be negative :) (e.g. A1=-0.01 not possible.)
therefore don't include elements having zero value.
Elements having zero value will not be resposible for n.
I mean if B is=>{34,34,0,0,34} Then n=3 and sum=102.
APPLY EQUATION (1), YOU WILL GET THE ANSWER.
I think this much explanation is CRYSTAL CLEAR!!
MY SOLUTION=>http://www.codechef.com/viewsolution/5699787
```