x, a= [ int(v) for v in input().split() ]

powlist = sorted([ int(v) for v in input().split() ])

mod = 1000003

def calculated_powlist(x,y):
	anslist = [ 1 for i in range(y+1) ]
	for i in range(y):
		anslist[i+1] = (anslist[i]*x) % mod

	return anslist

callist = calculated_powlist(x,max(powlist))

s = 0
for i in powlist:
	s += callist[i]
print(s%mod)