# -*- coding: utf-8 -*-


if __name__ == '__main__':
    xN = list(map(int, input().split()))
    x = xN[0]
    N = xN[1]
    exponent_list = list(map(int, input().split()))
    sum_values = 0
    for exponent in exponent_list:
        sum_values += pow(x, exponent) % 1000003
    print(sum_values % 1000003)