21 lines
377 B
C++
21 lines
377 B
C++
#include <bits/stdc++.h>
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using namespace std;
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typedef long long LL;
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LL qmi(LL a, LL k, LL p) {
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LL res = 1;
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while (k) {
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if (k & 1) res = res * a % p;
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k >>= 1;
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a = a * a % p;
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}
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return res;
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}
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int main() {
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int a, p;
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cin >> a >> p;
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LL x = qmi(a, p - 2, p); // x为a在mod p意义下的逆元
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return 0;
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} |