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2 years ago
#include <bits/stdc++.h>
using namespace std;
const int N = 1e5 + 10;
#define int long long
#define endl '\n'
// 快速幂
int qmi(int a, int b, int p) {
int res = 1;
while (b) {
if (b & 1) res = res * a % p;
b >>= 1;
a = a * a % p;
}
return res;
}
// 求单个数的欧拉函数值
int phi(int x) {
int res = x;
for (int i = 2; i <= x / i; i++)
if (x % i == 0) {
res = res / i * (i - 1);
while (x % i == 0) x /= i;
}
if (x > 1) res = res / x * (x - 1);
return res;
}
// 判断n层幂塔指数是否>=phi
bool check(int a, int n, int phi) {
if (n == 0) return phi <= 1; // 0层幂塔是1
if (a >= phi) return true; // 底数a>=phi那么它的幂塔一定>=phi
return check(a, n - 1, log(phi) / log(a)); // 取对数,消去一层,继续判断
}
// 计算n层幂塔: a^a^a^a..^a (mod m)
// 其中共有n个a
int f(int a, int n, int m) {
if (m == 1) return 0; // 对1取模恒为0
if (n <= 1) return qmi(a, n, m);
int p = phi(m);
// 互质
if (__gcd(a, m) == 1) return qmi(a, f(a, n - 1, p), m);
// 不互质
if (check(a, n - 1, p))
return qmi(a, f(a, n - 1, p) + p, m); // a的指数>=phi
return qmi(a, f(a, n - 1, p), m); // a的指数<phi, 所以改成对phi取模对答案无影响
}
signed main() {
int T;
cin >> T;
while (T--) {
int a, n, m;
cin >> a >> n >> m;
cout << f(a, n, m) << endl;
}
}