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  1. #include <iostream>
  2. using namespace std;
  3. string A(long long N) {return N == 0 ? "" : A((N - 1) / 5) + "13579"[(N - 1) % 5];}
  4. int main() {
  5.     long long N; cin >> N; cout << A(N);
  6.     return 0;
  7. }
Success #stdin #stdout 0.01s 5288KB
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stdin
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1000000000000000000
stdout
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51571955777777777777777779
https://ideone.com/cEWBXX
language:
C++ (gcc 8.3)
created:
11 days ago
visibility:
public

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