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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. using ll = long long;
  5.  
  6. void solve() {
  7. 	string x;
  8. 	cin >> x;
  9. 	for (int i = 0; i < x.size(); i++) {
  10. 		if (x[i] == '7') {
  11. 			cout << 0 << endl;
  12. 			return;
  13. 		}
  14. 	}
  15. 	ll v = stoll(x);
  16. 	for (int i = 1; i <= 7; i++) {
  17. 		v--;
  18. 		string y = to_string(v);
  19. 		auto it = find(y.begin(), y.end(), '7');
  20. 		if (it != y.end()) {
  21. 			cout << i << endl;
  22. 			return;
  23. 		}
  24.  
  25. 		it = find(y.begin(), y.end(), '7' - i);
  26. 		if (it != y.end()) {
  27. 			cout << i << endl;
  28. 			return;
  29. 		}
  30.  
  31. 	}
  32. 	cout << 7 << endl;
  33. }
  34.  
  35. int main() {
  36. 	int t;
  37. 	cin >> t;
  38. 	while (t--) solve();
  39. }
Success #stdin #stdout 0.01s 5276KB
comments (?)
stdin
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16
51
60
61
777
12345689
1000000000
2002
3001
977
989898986
80
800001
96
70
15
90
stdout
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3
2
1
0
1
3
5
4
0
7
1
2
7
0
7
3
https://ideone.com/J7ZidR
language:
C++14 (gcc 8.3)
created:
10 days ago
visibility:
public

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