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#				 Author: Udit "luctivud" Gupta @ https://www.linkedin.com/in/udit-gupta-1b7863135/					 #


import math;   		from collections import *
import sys;   		from functools import reduce
import time;   		from itertools import groupby

# sys.setrecursionlimit(10**6)

# def input()         : return sys.stdin.readline()
def get_ints()      : return map(int, input().strip().split())
def get_list()      : return list(get_ints())
def get_string()    : return list(input().strip().split())
def printxsp(*args) : return print(*args, end="")
def printsp(*args)  : return print(*args, end=" ")


DIRECTIONS = [(+0, +1), (+0, -1), (+1, +0), (+1, -1)] 
NEIGHBOURS = [(-1, -1), (-1, +0), (-1, +1), (+0, -1),\
              (+1, +1), (+1, +0), (+1, -1), (+0, +1)]



# MAIN >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

# se = set()
# n = 16; x = 2; m = 1001
# for i in range(n):
# 	print(x % m, i)
# 	if (x % m) in se:
# 		print(x % m, i)
# 	else:
# 		se.add(x % m)
# 	x **= 2;
# 	x %= m


n, x, m = get_ints()
prefix_sum = [0]
found = set()
d = dict()
ind = 0; doneInd = 1;
for i in range(n):
	if (x % m) not in found:
		found.add(x % m)
		d[x % m] = i
		prefix_sum.append(prefix_sum[-1] + (x % m))
	else:
		ind = d[x % m]
		doneInd = i
		break
	x **= 2
	x %= m
# print(ind, doneInd, prefix_sum[ind])
# print(prefix_sum)
# print(prefix_sum)

try:
	lastset = prefix_sum[-1] - prefix_sum[ind];
	offset = prefix_sum[ind]

	sz = len(prefix_sum) - ind - 1

	rem = n - ind
	ans = offset
	ans += lastset * (rem // sz)
	ans += prefix_sum[ind + (rem % sz)] - offset
# print(sz, lastset, rem)
except:
	ans = 1

print(ans)





Measured memory_bytes: 21332