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#include <fstream>
using namespace std;
ifstream fin ("inversmodular.in");
ofstream fout("inversmodular.out");
int A,N,c,x,y,d;
void cmmdc(int a, int b, int &x, int &y) {
if (b==0){
d=a;
x=1;
y=0;
}
else{
int x0,y0;
cmmdc(b,a%b,x0,y0);
x=y0;
y=x0-(a/b)*y0;
}
}
int main() {
fin>>A>>N;
cmmdc(A,N,x,y);
fout<<x;
fin.close();
fout.close();
return 0;
}