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22 lines
385 B
C++
22 lines
385 B
C++
#include <bits/stdc++.h>
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using namespace std;
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long long bintimes(long long a, long long b, long long m) {
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a %= m;
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long long res = 0;
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while (b > 0) {
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if (b & 1) res = (res + a) % m;
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a = (a + a) % m;
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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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long long a, b, p;
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cin >> a >> b >> p;
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cout << bintimes(a, b, p) << endl;
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return 0;
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}
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