# import sys; input = sys.stdin.buffer.readline
# sys.setrecursionlimit(10**7)
from collections import defaultdict
con = 10 ** 9 + 7; INF = float("inf")

def getlist():
	return list(map(int, input().split()))

#処理内容
def main():
	A, B, C = getlist()
	ans = 0
	for i in range(1, C):
		if i <= A % C:
			ans += pow(i, B, C) * (int(A // C) + 1)
		else:
			ans += pow(i, B, C) * int(A // C)

	print(ans % C)

if __name__ == '__main__':
	main()