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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int n, m, a[200001], b[200001];
  5. long long ca[200001], cb[200001];
  6. long long l[200001], r[200001];
  7.  
  8. int main()
  9. {
  10. 	int n, m;
  11.     cin >> n >> m;
  12.     for(int i = 1; i <= n; i++){
  13.     	cin >> a[i] >> b[i];
  14.     	ca[a[i]]++;
  15.     	cb[b[i]]++;
  16.     }
  17.     for(int i = 0; i <= m; i++)
  18.         for(int j = 0; j <= m; j++)
  19.             if(i != j) l[i + j] += ca[i] * ca[j], r[i + j] += cb[i] * cb[j];
  20.     for(int i = 0; i <= m; i++){
  21.     	l[i + i] += ca[i] * ca[i];
  22.     	r[i + i] += cb[i] * cb[i];
  23.     }
  24.     long long ans = 0;
  25.     for(int i = 0; i <= 2*m; i++){
  26.         ans += l[i];
  27.         cout << ans << endl;
  28.         ans -= r[i];
  29.     }
  30. }
Success #stdin #stdout 0.01s 9692KB
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https://ideone.com/MDIObo
language:
C++14 (gcc 8.3)
created:
2 years ago
visibility:
public

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