#include <fstream>

using namespace std;

ifstream in("inversmodular.in");
ofstream out("inversmodular.out");

int a,n,ok=1;

int main()
{
    in>>a>>n;
    int i=1;
    while(ok)
    {
        if((a*i)%n==1)
            out<<i,ok=0;
        else
            i++;
    }
    return 0;
}