21 lines
378 B
C++
21 lines
378 B
C++
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#include <bits/stdc++.h>
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using namespace std;
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#define int long long
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// 龟速乘
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int gui(int a, int b, int p) {
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int res = 0;
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while (b) {
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if (b & 1) res = (res + a) % p;
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a = (a + a) % p;
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b >>= 1;
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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, b, p;
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cin >> a >> b >> p;
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printf("%lld\n", gui(a, b, p));
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return 0;
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}
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