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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3.  
  4. typedef long long ll;
  5.  
  6. signed main(){
  7.  
  8. 	ios_base::sync_with_stdio(false);
  9. 	cin.tie(0);
  10.  
  11. 	int t;
  12. 	cin >> t;
  13.  
  14. 	while(t--){
  15. 		ll n, x, y;
  16. 		cin >> n >> x >> y;
  17. 		ll k = (x * y) / __gcd(x, y);
  18. 		ll chung = n / k;
  19. 		ll mx = n / x - chung;
  20. 		ll my = n / y - chung;	
  21.  
  22. 		ll a = (n + n - mx + 1) * mx / 2;
  23. 		ll b = (1 + my) * my / 2;
  24. 		cout << a - b << '\n';
  25.  
  26. 	}	
  27.  
  28. 	return 0;
  29. }
  30.  
Success #stdin #stdout 0s 5304KB
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https://ideone.com/FTniwk
language:
C++14 (gcc 8.3)
created:
10 days ago
visibility:
public

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