#include #include #include #include #include #include #include #include #include #include #include #include #include #define p(s) cout<<(s)<=n;i--) #define CK(n,a,b) ((a)<=(n)&&(n)<(b)) #define F first #define S second typedef long long int ll; using namespace std; const int mod=1e9+7; int N, K; vector hurui_v(int n) { vector v; bool *isPrime_v; isPrime_v = new bool[n + 1]; // 処理用のメモリ確保 // 初期化 isPrime_v[0] = isPrime_v[1] = false; for (int i = 2; i < n + 1; i++) isPrime_v[i] = true; // isPrime[0~n]で素数のものだけtrueにする for (int i = 2; i*i <= n; i++) { for (int j = i * 2; j < n + 1; j += i) { isPrime_v[j] = false; } } // 素数のみ追加 for (int i = 0; i < n + 1; i++) { if (isPrime_v[i]) v.push_back(i); } delete[] isPrime_v; //メモリ解放 return v; } int dp[2000010]; int ans; int main(){ cin>>N>>K; vector prime = hurui_v(N); p(prime.size()); dp[1]=0; REP(i,1,N){ for(auto p:prime){ dp[i*p] = max(dp[i*p], dp[i]+(i%p!=0)); } } REP(i,2,N+1){ if(dp[i]>=K) ans++; } p(ans); return 0; }