#include <algorithm>
#include <bitset>
#include <cassert>
#include <cctype>
#include <cfloat>
#include <climits>
#include <cmath>
#include <cstdio>
#include <deque>
#include <iomanip>
#include <iostream>
#include <list>
#include <map>
#include <queue>
#include <random>
#include <set>
#include <stack>
#include <string>
#include <unordered_set>
#include <vector>
using namespace std;
typedef long double ld;
typedef long long int ll;
typedef unsigned long long int ull;
typedef vector<int> vi;
typedef vector<char> vc;
typedef vector<bool> vb;
typedef vector<double> vd;
typedef vector<string> vs;
typedef vector<ll> vll;
typedef vector<pair<int, int>> vpii;
typedef vector<pair<ll, ll>> vpll;
typedef vector<vi> vvi;
typedef vector<vvi> vvvi;
typedef vector<vc> vvc;
typedef vector<vs> vvs;
typedef vector<vll> vvll;
typedef map<int, int> mii;
typedef set<int> si;
#define rep(i, n) for (ll i = 0; i < (n); ++i)
#define rrep(i, n) for (int i = 1; i <= (n); ++i)
#define arep(i, v) for (auto i : v)
#define irep(it, stl) for (auto it = stl.begin(); it != stl.end(); it++)
#define drep(i, n) for (int i = (n)-1; i >= 0; --i)
#define fin(ans) cout << (ans) << '\n'
#define STLL(s) strtoll(s.c_str(), NULL, 10)
#define mp(p, q) make_pair(p, q)
#define pb(n) push_back(n)
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define Sort(a) sort(a.begin(), a.end())
#define Rort(a) sort(a.rbegin(), a.rend())
#define MATHPI acos(-1)
#define fi first
#define se second
// #include <atcoder/all>
// using namespace atcoder;
constexpr int dx[8] = {1, 0, -1, 0, 1, -1, -1, 1};
constexpr int dy[8] = {0, 1, 0, -1, 1, 1, -1, -1};
template <class T>
inline bool chmax(T& a, T b) {
    if (a < b) {
        a = b;
        return 1;
    }
    return 0;
}
template <class T>
inline bool chmin(T& a, T b) {
    if (a > b) {
        a = b;
        return 1;
    }
    return 0;
}
template <class T>
inline void dump(T& v) {
    irep(i, v) { cout << (*i) << ((i == --v.end()) ? '\n' : ' '); }
}
template <class T, class U>
inline void dump(map<T, U>& v) {
    irep(i, v) { cout << i->first << " " << i->second << '\n'; }
}
inline string getline() {
    string s;
    getline(cin, s);
    return s;
}
inline void yn(const bool b) { b ? fin("yes") : fin("no"); }
inline void Yn(const bool b) { b ? fin("Yes") : fin("No"); }
inline void YN(const bool b) { b ? fin("YES") : fin("NO"); }
struct io {
    io() {
        ios::sync_with_stdio(false);
        cin.tie(0);
    }
};
const int INF = INT_MAX;
constexpr ll LLINF = 1LL << 61;
constexpr ll MOD = 998244353;  // 1000000007;
constexpr ld EPS = 1e-11;

/* --------------------   ここまでテンプレ   -------------------- */

int main() {
    ll n, x, m;
    cin >> n >> x >> m;
    ll ans = x;
    map<ll, ll> ma;
    bool ch = 0;
    for (ll i = 1; i < n; i++) {
        x = x * x % m;
        if (ch) {
            ans += x;
            continue;
        }

        if (ma.find(x) != ma.end()) {
            // cout << i << " " << x << " " << ma[x] << endl;
            ll diff = i - ma[x];
            ll syu = (n - i) / diff;
            ll syux = x;
            ll syusum = x;
            if (syu > 0) {
                for (ll j = i; j < i + diff - 1; j++) {
                    syux = syux * syux % m;
                    syusum += syux;
                }
            }
            // cout << syu << " " << syux << " " << syusum << " " << diff << endl;
            ans += syu * syusum;
            i += max(syu * diff - 1, 0LL);
            x=syux;
            ch = 1;
        } else if (x == 0) {
            break;
        } else {
            ma[x] = i;
            ans += x;
        }
    }
    fin(ans);
}
// 4367

Measured memory_bytes: 6728