def binary(A,n,x):
	left=0
	right=n-1
	result=-1
	while(left<=right):
		mid=(left+right)//2
		if(x==A[mid]):
			result=mid
			left=mid+1
			
		elif(x<A[mid]):
			rigtht=mid-1
		else:
			left=mid+1
	return result
l1=[1,3,20,20,20,45,65]
k=len(l1)
print(binary(l1,k,20))