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  1. #include <bits/stdc++.h>
  2.  
  3. #define ll long long
  4. #define el cout << '\n'
  5.  
  6. using namespace std;
  7.  
  8. struct Query
  9. {
  10.     int id, x, mobius;  
  11. };
  12.  
  13. const int maxn = 1e6;
  14. const int maxx = 1e6;
  15.  
  16. int n, q, a[maxn + 10], cnt[maxx + 10], ans[maxn + 10];
  17. vector<Query> v[maxn + 10];
  18.  
  19. int main()
  20. {
  21.     ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  22.     if (fopen("CNTX.INP", "r"))
  23.     {
  24.         freopen("CNTX.INP", "r", stdin);
  25.         freopen("CNTX.OUT", "w", stdout);
  26.     }
  27.  
  28.     cin >> n;
  29.     for (int i = 1; i <= n; i++)
  30.         cin >> a[i];
  31.     cin >> q;
  32.     for (int i = 1; i <= q; i++)
  33.     {
  34.         int l, r, x;
  35.         cin >> l >> r >> x;
  36.         v[l - 1].push_back({i, x, -1});
  37.         v[r].push_back({i, x, 1});
  38.     }
  39.     for (int i = 1; i <= n; i++)
  40.     {
  41.         cnt[a[i]]++;
  42.         for (Query x : v[i])
  43.             ans[x.id] += cnt[x.x] * x.mobius;
  44.     }
  45.     for (int i = 1; i <= q; i++)
  46.         cout << ans[i], el;
  47. }
Success #stdin #stdout 0.01s 28892KB
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https://ideone.com/6fqPS1
language:
C++14 (gcc 8.3)
created:
12 days ago
visibility:
public

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