#define _CRT_SECURE_NO_WARNINGS #define _USE_MATH_DEFINES #include <iostream> #include <map> #include <list> #include <cstdio> #include <cmath> #include <cstring> #include <string> #include <vector> #include <algorithm> #include <utility> #include <queue> #include <iomanip> #define INF 1050000000 #define SIZE 100001 #define MOD 1000000007 using namespace std; int main(void) { int w, d; cin >> w >> d; for (int i = d; i >= 1; i--) { if (i == 1) { w = (w / i / i); } else { w = w - (w / i / i); } } cout << w << endl; return (0); } /*for (int i = 0; i < n; i++) { }*/