import sys
sys.setrecursionlimit(5*10**5)
input = sys.stdin.readline
from collections import defaultdict, deque, Counter
from heapq import heappop, heappush
from bisect import bisect_left, bisect_right
from math import gcd

n,m,b = map(int,input().split())
a = list(map(int,input().split()))
ans = 0
for i in range(n):
    ans += pow(m, a[i]) + 1
    ans %= b

print(ans)