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  1. #include<bits/stdc++.h>
  2. #define f1(i, n) for(ll i=1;i<=n;++i)
  3. #define f0(i, n) for(ll i=0;i<n;++i)
  4. #define ull unsigned long long
  5. #define ll long long
  6. #define rev(a) reverse(a.begin(),a.end())
  7. #define all(x) x.begin(),x.end()
  8. #define so(A, n) sort(A+1, A+n+1)
  9. using namespace std;
  10. const int maxn = 2e5 + 1;
  11. // ll A[maxn];
  12. int main()
  13. {
  14. 	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  15. 	string s;
  16. 	int n, pos;
  17. 	cin >> s >> n >> pos;
  18. 	int cnt = 0;
  19. 	for (int i = 0; i < s.size() && cnt < pos; ++i) {
  20. 		if (s[i] == '1') {
  21. 			cnt++;
  22. 		}
  23. 		else {
  24. 			int luythua = 1, motcaigiday = s[i] - 48;
  25. 			while (cnt + motcaigiday < pos && luythua <= n) {
  26. 				motcaigiday = pow(s[i] - 48, luythua);
  27. 				++luythua;
  28. 			}
  29. 			if (cnt + motcaigiday >= pos) {
  30. 				cout << s[i];
  31. 				return 0;
  32. 			}
  33. 			else {
  34. 				cnt += motcaigiday;
  35. 			}
  36. 		}
  37. 	}
  38.  
  39.  
  40. 	return 0;
  41. }
  42.  
  43.  
Success #stdin #stdout 0.01s 5280KB
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https://ideone.com/jl6gOM
Bài 5 - LHP 2024 - 2025
language:
C++14 (gcc 8.3)
created:
13 days ago
visibility:
public

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