Now i want to make this problem more clear...

binary serach algo is as:

Code:

BinarySearch(A[0..N-1], value) {
low = 0
high = N - 1
while (low <= high) {
mid = (low + high) / 2
if (A[mid] > value) ///First check
high = mid - 1
else if (A[mid] < value) //second check
low = mid + 1
else
return mid // found
}
return -1 // not found
}

In a while loop there is two check(if condition) ...You have to reduce it by one inside while loop.