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#include <fstream>
using namespace std;
ifstream fin("inversmodular.in");
ofstream fout("inversmodular.out");
void euclid(int a, int b, long long &d, long long &x, long long &y)
{
if (b == 0) {
d = a;
x = 1;
y = 0;
} else {
long long x0, y0;
euclid(b, a % b, d, x0, y0);
x = y0;
y = x0 - (a / b) * y0;
}
}
int main()
{
int a,n;
fin>>a>>n;
long long x,y,d;
euclid(a,n,d,x,y);
fout<<x;
return 0;
}