# include <fstream>
using namespace std;
ifstream f("inversmodular.in");
ofstream g("inversmodular.out");
int c[102][102],s[102],p[102],n,k,i,j,pas,x,y;
void inversModular(int a,int b,int &x,int &y){
    int x1,y1;
    if(b==0){
        x=1;
        y=0;
        return;
    }
    inversModular(b,a%b,x1,y1);
    x=y1;
    y=x1-(1LL*(a/b)*y1)%k;
    if(y<0)
        y+=k;
}
int main () {
    f>>n>>k;
    inversModular(n,k,x,y);
    g<<x<<"\n";
    return 0;
}