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mirror of https://git.sb/baoshuo/OI-codes.git synced 2024-12-24 03:31:59 +00:00
Baoshuo Ren 2022-04-20 16:25:06 +08:00
parent 7d50a57e6f
commit bda3a10622
Signed by: baoshuo
GPG Key ID: 70F90A673FB1AB68

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AcWing/203/203.cpp Normal file
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#include <iostream>
using std::cin;
using std::cout;
const char endl = '\n';
int a, b, x, y;
int exgcd(int a, int b, int &x, int &y) {
if (!b) {
x = 1;
y = 0;
return a;
}
int g = exgcd(b, a % b, y, x);
y -= a / b * x;
return g;
}
int main() {
std::ios::sync_with_stdio(false);
cin >> a >> b;
exgcd(a, b, x, y);
cout << (x % b + b) % b << endl;
return 0;
}