#include<stdio.h>
void euclid(int a,int b,int *d,int *x,int *y)
{if(b==0)
 {*d=a;
  *x=1;
  *y=0;  
         
 }
 else
  {int x0,y0;
   euclid(b,a%b,d,&x0,&y0);
   *x=x0;
   *y=x0-(a/b)*y0;
          
         }
     
}
int main()
{freopen("inversmodular.in","r",stdin);
 freopen("inversmodular.out","w",stdout);
 int x,y;
 int a,b,c=1;
 scanf("%d %d",&x,&y);
 euclid(x,y,&c,&a,&b);
 printf("%d ",a); 
 fclose(stdout);
 fclose(stdin);
}