fork download
copy 
  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. const int M = 1e6 + 5;
  5. int f[M], b[M], a[M]; 
  6.  
  7. int main() {
  8.     ios::sync_with_stdio(0); cin.tie(0);
  9.  
  10.     for (int i = 2; i < M; i++) {
  11.         if (!f[i]) {
  12.             for (int j = i; j < M; j += i) if (!f[j]) f[j] = i;
  13.         }
  14.     }
  15.  
  16.     int n, m;
  17.     cin >> n >> m;
  18.     for (int i = 0; i < n; i++) cin >> a[i];
  19.  
  20.     for (int i = 0; i < m; i++) {
  21.         int x; cin >> x;
  22.         while (x > 1) {
  23.             int p = f[x];
  24.             b[p] = 1; 
  25.             while (x % p == 0) x /= p;
  26.         }
  27.     }
  28.  
  29.     for (int i = 2; i < M; i++) {
  30.         if (b[f[i]]) b[i] = 1;
  31.     }
  32.  
  33.     int ans = 0;
  34.     for (int i = 0; i < n; i++) {
  35.         if (a[i] == 1 || !b[a[i]]) ans++;
  36.     }
  37.  
  38.     cout << ans;
  39.     return 0;
  40. }
Success #stdin #stdout 0.13s 9444KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
21940
https://ideone.com/4VtrOu
language:
C++14 (gcc 8.3)
created:
6 hours ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!