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  1. #include <bits/stdc++.h>
  2. #define ll long long
  3.  
  4. using namespace std;
  5.  
  6. const int MOD = 1e9 + 7;
  7.  
  8. void solve(){
  9. 	int n;
  10. 	cin >> n;
  11.  
  12. 	ll cnt = 2;
  13. 	ll sum = 1;
  14. 	int x = 2;
  15. 	while(sum + x <= n){
  16. 		sum += x;
  17. 		x++;
  18. 		cnt++;
  19. 	}
  20. 	int rem = n - sum;
  21. 	cout << "133";
  22. 	while(rem--){
  23. 		cout << "7";
  24. 	}
  25. 	cnt -= 2;
  26. 	while(cnt--){
  27. 		cout << "3";
  28. 	}
  29. 	cout << "7\n";
  30.  
  31. }
  32.  
  33. int main(){
  34. 	ios_base::sync_with_stdio(false);
  35. 	cin.tie(nullptr);
  36.  
  37. 	int t = 1;
  38. 	cin >> t;
  39.  
  40. 	for(int i = 1; i <= t; i++){
  41. 		solve();
  42. 	}
  43. 	return 0;
  44. }
Success #stdin #stdout 0s 5284KB
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stdout
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https://ideone.com/cpBu1R
language:
C++14 (gcc 8.3)
created:
3 days ago
visibility:
public

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