#include<cstdio>
#include<iostream>
#include<assert.h>
#include<vector>
#define M 666013

using namespace std;

inline int euclid_extins(int a,int b,long long &x,long long &y)
{
    if(b==0)
    {
        x=1;
        y=0;
        return a;
    }
    long long x0,y0,ans;
    ans=euclid_extins(b,a%b,x0,y0);
    x=y0;
    y=x0-y0*(a/b);
    return ans;

}

void read()
{
    freopen("euclid3.in","r",stdin);
    freopen("euclid3.out","w",stdout);
    int T;
    for( scanf("%d",&T),assert(T<=100);T;T--)
    {
        int a,b,c;
        scanf("%d%d%d",&a,&b,&c);
        long long ras,x,y;

        ras=euclid_extins(a,b,x,y);
        //printf("%d\n",ras);
        if(c%ras)
            printf("0 0\n");
        else
            printf("%d %d\n",x*(c/ras),y*(c/ras));

    }

}



void read2()
{
    int a,n,ras;
    freopen("inversmodular.in","r",stdin);
    freopen("inversmodular.out","w",stdout);
    scanf("%d%d",&a,&n);
    long long x,y;
    ras=euclid_extins(a,n,x,y);
    //ras=1 mereu
    while(x<=0)
    x+=n;
    printf("%d",x);

}


int main()
{
   // read();
   read2();
}