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  1. #include <iostream>
  2. #include <vector>
  3. #include <algorithm>
  4.  
  5. using namespace std;
  6.  
  7. int main() {
  8.     ios::sync_with_stdio(false);
  9.     cin.tie(nullptr);
  10.  
  11.     int N, Q;
  12.     cin >> N >> Q;
  13.  
  14.     vector<int> A(N + 1); 
  15.     vector<vector<int>> positions(100001); 
  16.  
  17.     for (int i = 1; i <= N; ++i) {
  18.         cin >> A[i];
  19.         positions[A[i]].push_back(i); 
  20.     }
  21.  
  22.     while (Q--) {
  23.         int L, R, X, Y;
  24.         cin >> L >> R >> X >> Y;
  25.  
  26.         int count = 0;
  27.         for (int val = X; val <= Y; ++val) {
  28.             if (positions[val].empty()) continue;
  29.  
  30.             auto &vec = positions[val];
  31.  
  32.  
  33.             int left = lower_bound(vec.begin(), vec.end(), L) - vec.begin();
  34.             int right = upper_bound(vec.begin(), vec.end(), R) - vec.begin();
  35.  
  36.             count += (right - left);
  37.         }
  38.  
  39.         cout << count << "\n";
  40.     }
  41.  
  42.     return 0;
  43. }
  44.  
Success #stdin #stdout 3.02s 1834992KB
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C++ (gcc 8.3)
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