func_code_string: #include <bits/stdc++.h>   using namespace std;   class Solution {    public:     long long count(long long _m, long long _x) {       if (_m < 3) {         return max(0LL, _m);       }       m = _m;       x = _x;       vector<pair<long long, int>> cnts = factorize(m);       long long res = 0;       search(0, 1, cnts, res);       return res;     }       private:     map<long long, vector<pair<long long, int>>> fs;     long long m, x;     long long gcd(long long x, long long y) {       while (x != 0) {         y %= x;         swap(x, y);       }       return y;     }     vector<pair<long long, int>>& factorize(long long n) {       if (fs.count(n) > 0) {         return fs[n];       }       vector<pair<long long, int>>& res = fs[n];       for (long long i = 2; i * i <= n; ++i) {         int cnt = 0;         while (n % i == 0) {           ++cnt;           n /= i;         }         if (cnt > 0) {           res.emplace_back(i, cnt);         }       }       if (n > 1) {         res.emplace_back(n, 1);       }       return res;     }     void search(int i, long long dv, vector<pair<long long, int>>& cnts,                 long long& ans) {       if (i >= cnts.size()) {         vector<pair<long long, int>> dvcnts;         dvcnts.reserve(cnts.size());         for (auto& pc : cnts) {           if (pc.second <= 1) {             continue;           }           dvcnts.emplace_back(pc.first, pc.second - 1);         }         long long phi = dv;         for (auto& pc : cnts) {           long long p = pc.first;           int c = pc.second;           if (c == 0) {             continue;           }           dvcnts = merge(dvcnts, factorize(p - 1));           phi = phi - phi / p;         }         ans += phi / calcPeriod(x % dv, dv, dvcnts);         return;       }       long long p = fs[m][i].first;       long long n = fs[m][i].second;       for (int j = 0; j <= n; ++j) {         cnts[i].second = j;         search(i + 1, dv, cnts, ans);         dv *= p;       }     }     vector<pair<long long, int>> merge(vector<pair<long long, int>>& list1,                                        vector<pair<long long, int>>& list2) {       vector<pair<long long, int>> res;       res.reserve(list1.size() + list2.size());       int n = list1.size(), m = list2.size();       int i = 0, j = 0;       while (i < n && j < m) {         if (list1[i].first < list2[j].first) {           res.emplace_back(list1[i].first, list1[i].second);           ++i;         } else if (list1[i].first > list2[j].first) {           res.emplace_back(list2[j].first, list2[j].second);           ++j;         } else {           res.emplace_back(list1[i].first, list1[i].second + list2[j].second);           ++i;           ++j;         }       }       while (i < n) {         res.emplace_back(list1[i].first, list1[i].second);         ++i;       }       while (j < m) {         res.emplace_back(list2[j].first, list2[j].second);         ++j;       }       return res;     }     long long calcPeriod(long long x, long long mod,                          vector<pair<long long, int>>& factors) {       long long phi = 1;       for (auto& pc : factors) {         long long p = pc.first;         int c = pc.second;         for (int i = 0; i < c; ++i) {           phi *= p;         }       }       long long res = 1;       for (auto& pc : factors) {         long long p = pc.first;         int c = pc.second;         long long base = phi;         for (int i = 0; i < c; ++i) {           base /= p;         }         long long val = powM(x, base, mod);         int j = c;         for (int i = 1; i <= c; ++i) {           if (val == 1) {             j = i - 1;             break;           }           val = powM(val, p, mod);         }         res *= powI(p, j);       }       return res;     }     long long mulM(long long a, long long b, long long m) {       long long res = 0;       while (b > 0) {         if (b & 0x1) {           res = (res + a) % m;         }         a = (a + a) % m;         b >>= 1;       }       return res;     }     long long powM(long long x, long long e, long long m) {       long long res = 1;       while (e > 0) {         if (e & 0x1) {           res = mulM(res, x, m);         }         x = mulM(x, x, m);         e >>= 1;       }       return res;     }     long long powI(long long x, long long e) {       long long res = 1;       for (int i = 0; i < e; ++i) {         res *= x;       }       return res;     }   };   int main(int argc, char** argv) {     ios::sync_with_stdio(false);     cin.tie(0);     long long m, x;     cin >> m >> x;     Solution sol;     cout << sol.count(m, x) << endl;     return 0;   }   