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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4. string s;
  5.  
  6. string f(int a) {
  7.     string b = "";
  8.     while (a) {
  9.         b += (a % 10 + '0');
  10.         a /= 10;
  11.     }
  12.     reverse(b.begin(), b.end());
  13.     return b ;
  14. }
  15.  
  16. int main() {
  17.     int n;
  18.     cin>>n;
  19.     for (int i = 1; i <= 10000; ++i) {
  20.         s += f(i);
  21.     }
  22.     cout<<s[n - 1];
  23.     return 0;
  24. }
Success #stdin #stdout 0s 15240KB
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https://ideone.com/pcxnL4
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
public

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