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#include<fstream>
using namespace std;
ifstream fin("inversmodular.in");
ofstream fout("inversmodular.out");
int a,n;
void eucl(int a,int b,int &x,int &y,int d)
{
if(b==0)
{
d=a;
x=1;
y=0;
}
else
{
int x1,y1;
eucl(b,a%b,x1,y1,d);
x=y1;
y=x1-y1*(a/b);
}
}
int main()
{
int x,y,d;
fin>>a>>n;
eucl(a,n,x,y,d);
fout<<x;
fin.close();
fout.close();
return 0;
}