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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define int              long long int
  4. #define double           long double
  5. #define print(a)         for(auto x : a) cout << x << " "; cout << endl
  6.  
  7.  
  8. const int M = 1000000007;
  9. const int N = 3e5+9;
  10. const int INF = 2e9+1;
  11. const int LINF = 2000000000000000001;
  12.  
  13. inline int power(int a, int b, int mod=M) {
  14.     int x = 1;
  15.     a %= mod;
  16.     while (b) {
  17.         if (b & 1) x = (x * a) % mod; 
  18.         a = (a * a) % mod;
  19.         b >>= 1;
  20.     }
  21.     return x;
  22. }
  23.  
  24.  
  25. //_ ***************************** START Below *******************************
  26.  
  27.  
  28.  
  29.  
  30. vector<int> a;
  31. vector<int> b;
  32.  
  33. int consistency(int m, int n){
  34.  
  35.     unordered_map<int,int> countA, countB;
  36.  
  37.     for(int i=0; i<m; i++){
  38.         countA[a[i]]++;
  39.     }
  40.     for(int i=0; i<n; i++){
  41.         countB[b[i]]++;
  42.     }
  43.  
  44.     int M = 1e6+1;
  45.     vector<int> seive(M+2);
  46.  
  47.     for(auto& it : countA){
  48.         int x = it.first;
  49.         int ct = it.second;
  50.  
  51.         for(int j=x; j<=M+1; j+=x){
  52.             seive[j] += ct;
  53.         }
  54.     }
  55.  
  56.     int ans = 0;
  57.     for(int i=1; i<=M+1; i++){
  58.         if(countB.count(i)){
  59.             ans += countB[i]*seive[i];
  60.         }
  61.     }
  62.  
  63.     return ans;
  64.  
  65.  
  66.  
  67. }
  68.  
  69.  
  70.  
  71.  
  72.  
  73.  
  74.  
  75.  
  76.  
  77.  
  78.  
  79.  
  80.  
  81.  
  82.  
  83. int practice(int m, int n){
  84.  
  85.  
  86.     return 0;
  87. }
  88.  
  89.  
  90.  
  91.  
  92.  
  93. void solve() {
  94.  
  95.     int m, n;
  96.     cin>> m >> n;
  97.  
  98.     a.resize(m);
  99.     b.resize(n);
  100.     for(int i=0; i<m; i++) cin >> a[i];
  101.     for(int i=0; i<n; i++) cin >> b[i];
  102.  
  103.     cout << consistency(m, n) << endl;
  104.  
  105.  
  106. }
  107.  
  108.  
  109.  
  110.  
  111.  
  112. int32_t main() {
  113.     ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  114.  
  115.     int t = 1;
  116.     // cin >> t;
  117.     while (t--) {
  118.         solve();
  119.     }
  120.  
  121.     return 0;
  122. }
Success #stdin #stdout 0.03s 11072KB
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https://ideone.com/G4lYLC
language:
C++14 (gcc 8.3)
created:
7 hours ago
visibility:
public

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