using namespace std;
#include <bits/stdc++.h>
#define BEGIN ios_base::sync_with_stdio(0);cin.tie(0);
#define END return EXIT_SUCCESS;
#define FOR(I,A,B) for(int (I)=(A);(I)<(B);++(I))
#define ALL(C) (C).begin(),(C).end()
inline void solve()
{
	long W,D;
	cin>>W>>D;
	while(D>1)
	{
		W-=W/(D*D);
		D--;
	}
	cout<<W<<endl;
}
int main(int argc,char**argv)
{
    BEGIN
    solve();
    END
}