#include <bits/stdc++.h>
using namespace std;

template<typename T>
struct Z_p{
	using Type = typename decay<decltype(T::value)>::type;
	static vector<Type> mod_inv; 
	constexpr Z_p(): value(){ }
	template<typename U> Z_p(const U &x){ value = normalize(x); }
	template<typename U> static Type normalize(const U &x){
		Type v;
		if(-mod() <= x && x < mod()) v = static_cast<Type>(x);
		else v = static_cast<Type>(x % mod());
		if(v < 0) v += mod();
		return v;
	}
	const Type& operator()() const{ return value; }
	template<typename U> explicit operator U() const{ return static_cast<U>(value); }
	constexpr static Type mod(){ return T::value; }
	Z_p &operator+=(const Z_p &otr){ if((value += otr.value) >= mod()) value -= mod(); return *this; }
	Z_p &operator-=(const Z_p &otr){ if((value -= otr.value) < 0) value += mod(); return *this; }
	template<typename U> Z_p &operator+=(const U &otr){ return *this += Z_p(otr); }
	template<typename U> Z_p &operator-=(const U &otr){ return *this -= Z_p(otr); }
	Z_p &operator++(){ return *this += 1; }
	Z_p &operator--(){ return *this -= 1; }
	Z_p operator++(int){ Z_p result(*this); *this += 1; return result; }
	Z_p operator--(int){ Z_p result(*this); *this -= 1; return result; }
	Z_p operator-() const{ return Z_p(-value); }
	template<typename U = T>
	typename enable_if<is_same<typename Z_p<U>::Type, int>::value, Z_p>::type &operator*=(const Z_p& rhs){
		#ifdef _WIN32
		uint64_t x = static_cast<int64_t>(value) * static_cast<int64_t>(rhs.value);
		uint32_t xh = static_cast<uint32_t>(x >> 32), xl = static_cast<uint32_t>(x), d, m;
		asm(
			"divl %4; \n\t"
			: "=a" (d), "=d" (m)
			: "d" (xh), "a" (xl), "r" (mod())
		);
		value = m;
		#else
		value = normalize(static_cast<int64_t>(value) * static_cast<int64_t>(rhs.value));
		#endif
		return *this;
	}
	template<typename U = T>
	typename enable_if<is_same<typename Z_p<U>::Type, int64_t>::value, Z_p>::type &operator*=(const Z_p &rhs){
		int64_t q = static_cast<int64_t>(static_cast<long double>(value) * rhs.value / mod());
		value = normalize(value * rhs.value - q * mod());
		return *this;
	}
	template<typename U = T>
	typename enable_if<!is_integral<typename Z_p<U>::Type>::value, Z_p>::type &operator*=(const Z_p &rhs){
		value = normalize(value * rhs.value);
		return *this;
	}
	Z_p operator^(long long e) const{
		Z_p b = *this, res = 1;
		if(e < 0) b = 1 / b, e = -e;
		for(; e; b *= b, e >>= 1) if(e & 1) res *= b;
		return res;
	}
	Z_p &operator^=(const long long &e){ return *this = *this ^ e; }
	Z_p &operator/=(const Z_p &otr){
		Type a = otr.value, m = mod(), u = 0, v = 1;
		if(a < int(mod_inv.size())) return *this *= mod_inv[a];
		while(a){
			Type t = m / a;
			m -= t * a; swap(a, m);
			u -= t * v; swap(u, v);
		}
		assert(m == 1);
		return *this *= u;
	}
	template<typename U> friend const Z_p<U> &abs(const Z_p<U> &v){ return v; }
	template<typename U> friend bool operator==(const Z_p<U> &lhs, const Z_p<U> &rhs);
	template<typename U> friend bool operator<(const Z_p<U> &lhs, const Z_p<U> &rhs);
	template<typename U> friend istream &operator>>(istream &in, Z_p<U> &number);
	Type value;
};
template<typename T> bool operator==(const Z_p<T> &lhs, const Z_p<T> &rhs){ return lhs.value == rhs.value; }
template<typename T, typename U, typename enable_if<is_integral<U>::value>::type* = nullptr> bool operator==(const Z_p<T>& lhs, U rhs){ return lhs == Z_p<T>(rhs); }
template<typename T, typename U, typename enable_if<is_integral<U>::value>::type* = nullptr> bool operator==(U lhs, const Z_p<T> &rhs){ return Z_p<T>(lhs) == rhs; }
template<typename T> bool operator!=(const Z_p<T> &lhs, const Z_p<T> &rhs){ return !(lhs == rhs); }
template<typename T, typename U, typename enable_if<is_integral<U>::value>::type* = nullptr> bool operator!=(const Z_p<T> &lhs, U rhs){ return !(lhs == rhs); }
template<typename T, typename U, typename enable_if<is_integral<U>::value>::type* = nullptr> bool operator!=(U lhs, const Z_p<T> &rhs){ return !(lhs == rhs); }
template<typename T> bool operator<(const Z_p<T> &lhs, const Z_p<T> &rhs){ return lhs.value < rhs.value; }
template<typename T> Z_p<T> operator+(const Z_p<T> &lhs, const Z_p<T> &rhs){ return Z_p<T>(lhs) += rhs; }
template<typename T, typename U, typename enable_if<is_integral<U>::value>::type* = nullptr> Z_p<T> operator+(const Z_p<T> &lhs, U rhs){ return Z_p<T>(lhs) += rhs; }
template<typename T, typename U, typename enable_if<is_integral<U>::value>::type* = nullptr> Z_p<T> operator+(U lhs, const Z_p<T> &rhs){ return Z_p<T>(lhs) += rhs; }
template<typename T> Z_p<T> operator-(const Z_p<T> &lhs, const Z_p<T> &rhs){ return Z_p<T>(lhs) -= rhs; }
template<typename T, typename U, typename enable_if<is_integral<U>::value>::type* = nullptr> Z_p<T> operator-(const Z_p<T>& lhs, U rhs){ return Z_p<T>(lhs) -= rhs; }
template<typename T, typename U, typename enable_if<is_integral<U>::value>::type* = nullptr> Z_p<T> operator-(U lhs, const Z_p<T> &rhs){ return Z_p<T>(lhs) -= rhs; }
template<typename T> Z_p<T> operator*(const Z_p<T> &lhs, const Z_p<T> &rhs){ return Z_p<T>(lhs) *= rhs; }
template<typename T, typename U, typename enable_if<is_integral<U>::value>::type* = nullptr> Z_p<T> operator*(const Z_p<T>& lhs, U rhs){ return Z_p<T>(lhs) *= rhs; }
template<typename T, typename U, typename enable_if<is_integral<U>::value>::type* = nullptr> Z_p<T> operator*(U lhs, const Z_p<T> &rhs){ return Z_p<T>(lhs) *= rhs; }
template<typename T> Z_p<T> operator/(const Z_p<T> &lhs, const Z_p<T> &rhs) { return Z_p<T>(lhs) /= rhs; }
template<typename T, typename U, typename enable_if<is_integral<U>::value>::type* = nullptr> Z_p<T> operator/(const Z_p<T>& lhs, U rhs) { return Z_p<T>(lhs) /= rhs; }
template<typename T, typename U, typename enable_if<is_integral<U>::value>::type* = nullptr> Z_p<T> operator/(U lhs, const Z_p<T> &rhs) { return Z_p<T>(lhs) /= rhs; }
template<typename T> istream &operator>>(istream &in, Z_p<T> &number){
	typename common_type<typename Z_p<T>::Type, int64_t>::type x;
	in >> x;
	number.value = Z_p<T>::normalize(x);
	return in;
}
template<typename T> ostream &operator<<(ostream &out, const Z_p<T> &number){ return out << number(); }

using ModType = int;
struct VarMod{ static ModType value; };
ModType VarMod::value;
ModType &mod = VarMod::value;
using Zp = Z_p<VarMod>;

template<typename T> vector<typename Z_p<T>::Type> Z_p<T>::mod_inv;
template<typename T = integral_constant<decay<decltype(mod)>::type, mod>>
void precalc_inverse(size_t SZ){
	auto &inv = Z_p<T>::mod_inv;
	if(inv.empty()) inv.assign(2, 1);
	for(; inv.size() <= SZ; ) inv.push_back((mod - 1LL * mod / int(inv.size()) * inv[mod % int(inv.size())] % mod) % mod);
}

// DEBUG BEGIN
#ifdef LOCAL
template<typename L, typename R> ostream &operator<<(ostream &out, const pair<L, R> &p){
	return out << "(" << p.first << ", " << p.second << ")";
}
template<typename Tuple, size_t N> struct TuplePrinter{
	static ostream &print(ostream &out, const Tuple &t){ return TuplePrinter<Tuple, N-1>::print(out, t) << ", " << get<N-1>(t); }
};
template<typename Tuple> struct TuplePrinter<Tuple, 1>{
	static ostream &print(ostream &out, const Tuple& t){ return out << get<0>(t); }
};
template<typename... Args> ostream &print_tuple(ostream &out, const tuple<Args...> &t){
	return TuplePrinter<decltype(t), sizeof...(Args)>::print(out << "(", t) << ")";
}
template<typename ...Args> ostream &operator<<(ostream &out, const tuple<Args...> &t){
	return print_tuple(out, t);
}
template<typename T> ostream &operator<<(enable_if_t<!is_same<T, string>::value, ostream> &out, const T &arr){
	out << "{"; for(auto &x: arr) out << x << ", ";
	return out << (arr.size() ? "\b\b" : "") << "}";
}
template<size_t S> ostream &operator<<(ostream &out, const bitset<S> &b){
	for(int i = 0; i < S; ++ i) out << b[i];
	return out;
}
void debug_out(){ cerr << "\b\b " << endl; }
template<typename Head, typename... Tail>
void debug_out(Head H, Tail... T){ cerr << H << ", ", debug_out(T...); }
void debug2_out(){ cerr << "-----DEBUG END-----\n"; }
template<typename Head, typename... Tail>
void debug2_out(Head H, Tail... T){ cerr << "\n"; for(auto x: H) cerr << x << "\n"; debug2_out(T...); }
#define debug(...) cerr << "[" << #__VA_ARGS__ << "]: ", debug_out(__VA_ARGS__)
#define debug2(...) cerr << "----DEBUG BEGIN----\n[" << #__VA_ARGS__ << "]:", debug2_out(__VA_ARGS__)
#else
#define debug(...) 42
#define debug2(...) 42
#endif
// DEBUG END

int main(){
	cin.tie(0)->sync_with_stdio(0);
	cin.exceptions(ios::badbit | ios::failbit);
	long long n;
	int x;
	cin >> n >> x >> mod;
	vector<int> vis(mod), a;
	int p = 0;
	for(auto i = 0; ; ++ i){
		static Zp cur = x;
		if(vis[(int)cur]){
			while(a[p] != cur) ++ p;
			break;
		}
		vis[(int)cur] = true;
		a.push_back((int)cur);
		cur *= cur;
	}
	if(n <= p){
		cout << accumulate(a.begin(), a.begin() + n, 0LL) << "\n";
	}
	else{
		n -= p;
		int period = (int)a.size() - p;
		cout << accumulate(a.begin(), a.begin() + p, 0LL) + accumulate(a.begin() + p, a.end(), 0LL) * (n / period) + accumulate(a.begin() + p, a.begin() + p + n % period, 0LL) << "\n";
	}
	return 0;
}

/*

*/

////////////////////////////////////////////////////////////////////////////////////////
//                                                                                    //
//                                   Coded by Aeren                                   //
//                                                                                    //
////////////////////////////////////////////////////////////////////////////////////////

Measured memory_bytes: 4008