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#include <fstream>
using namespace std;
ifstream f("inversmodular.in");
ofstream g("inversmodular.out");
int invm(long long int a,long long int n)
{
int sol = 0;
for(long long int x=n/a;x<n;x++)
{
if((x*a)%n==1)
{
sol = x;
break;
}
}
return sol;
}
long long int a,n;
int main()
{
f>>a>>n;
g<<invm(a,n);
f.close(); g.close();
}