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#include <fstream>
using namespace std;
ifstream fin("inversmodular.in");
ofstream fout("inversmodular.out");
int x;
void euclid3(int a, int b, int x1, int y1, int x2, int y2)
{
if(!b) {
x = x1;
} else {
euclid3(b, a % b, x2, y2, x1 - a / b * x2, y1 - a / b * y2);
}
}
int main()
{
int a, b;
fin >> a >> b;
euclid3(a, b, 1, 0, 0, 1);
fout << x;
return 0;
}