void main()
{
	enum MOD = 1000003;
	const x = readInt;
	const N = readInt;
	auto A = new int[N];
	foreach (i; 0 .. N) A[i] = readInt;
	int ans;
	foreach (i; 0 .. N) {
		long a = 1, b = x;
		for (int j = A[i]; j; j >>= 1) {
			if (j & 1) {
				a = a * b % MOD;
			}
			b = b * b % MOD;
		}
		ans = (ans + a) % MOD;
	}
	ans.writeln;
}

import std,core.bitop;
string[]_R;
string readString(){while(_R.empty){_R=readln.chomp.split;}auto ret=_R.front;_R.popFront;return ret;}
int readInt(){return readString.to!int;}
long readLong(){return readString.to!long;}
ulong readULong(){return readString.to!ulong;}
real readReal(){return readString.to!real;}
bool chmin(T)(ref T A,T B){if(A>B){A=B;return true;}else{return false;}}
bool chmax(T)(ref T A,T B){if(A<B){A=B;return true;}else{return false;}}
int lowerBound(T)(T[]A,T x){int L=-1,R=cast(int)A.length;while(R-L>1){int mid=(L+R)/2;(A[mid]<x?L:R)=mid;}return R;}
int upperBound(T)(T[]A,T x){int L=-1,R=cast(int)A.length;while(R-L>1){int mid=(L+R)/2;(A[mid]<=x?L:R)=mid;}return R;}