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  1. #include <iostream>
  2. #include<bits/stdc++.h>
  3.  
  4.  
  5. using namespace std;
  6.  
  7. typedef long long int ll;
  8.  
  9.  
  10. int main() {
  11. 	ll n;
  12. 	cin>>n;
  13. 	vector<ll> a(n+1);
  14. 	vector<ll> b(n+1);
  15.  
  16. 	unordered_map<ll,ll> mpp_1;
  17. 	unordered_map<ll,ll> mpp_2;
  18.  
  19.  
  20. 	for(ll i=1;i<=n;i++){
  21. 		cin>> a[i];
  22. 		mpp_1[a[i]]++;
  23. 	}
  24.  
  25. 	for(int i=1;i<=n;i++){
  26. 		cin>>b[i];
  27. 		mpp_2[b[i]]++;
  28.  
  29. 	}
  30. 	ll ans = 0;
  31.  
  32. 	for(auto it : mpp_1){
  33. 		ll count = 0;
  34. 	    ll num = it.first;
  35. 	    for(int i=num ; i<=1000000 ;i = i+num){
  36.  
  37. 	    	if(mpp_2.find(i)!=mpp_2.end()){
  38. 	    	count = count + mpp_2[i];
  39. 	    	}
  40. 	    }
  41. 	    count = count*it.second;
  42. 	    ans=ans+count;
  43.  
  44.  
  45. 	}
  46.  
  47. 	cout<<ans;
  48.  
  49.  
  50.  
  51.  
  52.  
  53.  
  54. 	return 0;
  55. }
Success #stdin #stdout 0.06s 5288KB
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https://ideone.com/ZLk3qA
language:
C++14 (gcc 8.3)
created:
12 hours ago
visibility:
public

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