一本通1650：【例 3】组合

#include <stdio.h>
#define ll long long
ll pow(ll s, ll n, ll mod) {
    ll res = 1;

    while (n) {
        while (n % 2 == 0) {
            s = (s * s) % mod;
            n /= 2;
        }

        res = (res * s) % mod;
        n--;
    }

    return res;
}
ll C(ll m, ll n, ll mod) {
    ll res = 1, t = 1, i;

    for (i = 0; i < m; i++) {
        res = res * (n - i) % mod;
        t = t * (i + 1) % mod;
    }

    return res * pow(t, mod - 2, mod) % mod;
}
ll lukaer(ll m, ll n, ll mod) {
    return m ? C(m % mod, n % mod, mod) * lukaer(m / mod, n / mod, mod) % mod : 1;
}
int main() {
    ll n, m, p, t;
    scanf("%lld", &t);

    while (t--) {
        scanf("%lld%lld%lld", &n, &m, &p);
        printf("%lld\n", lukaer(m, n, p));
    }

    return 0;
}