#include <fstream>

using namespace std;
ofstream fout("inversmodular.out");
ifstream fin("inversmodular.in");

void gcd(int a, int b, int &x, int &y){
    if(b == 0){
        x = 1;
        y = 0;
        return;
    }

    gcd(b, a%b, x, y);
    int aux = x;
    x = y;
    y = aux - (a/b) * y;
}

int main()
{
    int a, n;

    fin >> a >> n;

    int x = 0;
    int y = 0;

    gcd(a, n, x, y);

    while(x < 1){
        x += n;
    }
    fout << x;
    return 0;
}