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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. void executeTime() {
  5.     cerr << "Time Taken: " << (float)clock() / CLOCKS_PER_SEC << " secs";
  6. }
  7.  
  8. int main() {
  9.  
  10.     int n, k1, k2; cin >> n >> k1 >> k2;
  11.  
  12.     vector<int> v(n);
  13.     for (auto &x : v) {
  14.         cin >> x;
  15.     }
  16.  
  17.     int ans = 0;
  18.     for (int j = 1; j <= n - 3; j++) {
  19.  
  20.         int op1 = 0;
  21.         int i = 0;
  22.  
  23.         while (i < j) {
  24.             if (v[i] + v[j] > k1) {
  25.                 op1++;
  26.             }
  27.  
  28.             i++;
  29.         }
  30.  
  31.         int op2 = 0;
  32.         int k = j + 1, l = n - 1;
  33.  
  34.         while (k < l) {
  35.             if (v[k] + v[l] > k2) {
  36.                 op2 += (l - k); l--;
  37.             }
  38.             else k++;
  39.         }
  40.  
  41.         ans += op1 * op2;
  42.     }
  43.  
  44.     cout << ans <<  endl;
  45.     executeTime();
  46.     return 0;
  47. }
Success #stdin #stdout #stderr 0.01s 5284KB
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stdin
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6 1 3
1 1 1 1 2 2
stdout
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6
stderr
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Time Taken: 0.005038 secs
https://ideone.com/twMNmm
language:
C++14 (gcc 8.3)
created:
6 hours ago
visibility:
public

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