#include <stdio.h>
int main()
{
	int c, first, last, middle, n, search, array[100];
	printf("Enter number of elements\n");
	scanf("%d",&n);
	printf("Enter %d integers\n", n);
	for (c = 0; c < n; c++)
	{
		scanf("%d",&array[c]);
	}
	printf("Enter value to find\n");
	scanf("%d", &search);
	first = 0;
	last = n - 1;
	middle = (first+last)/2;
	while (first <= last)
	{
		if (array[middle] < search)
		{
			first = middle + 1;
		}
		else if (array[middle] == search)
		{
			printf("%d found at location %d.\n", search, middle+1);
			break;
		}
		else
		{
			last = middle - 1;
			middle = (first + last)/2;
		}
		if (first > last)
		{
			printf("Not found! %d isn't present in the list.\n", search);
			return 0;
		}
	}
}