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  1. #pragma GCC optimize("02,unroll-loops")
  2. #pragma GCC target("avx2,fma")
  3. #include<iostream>
  4. #include <sstream>
  5. #include <iomanip>
  6. #define inout() ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  7. #define el cout << '\n'
  8. #define fi first
  9. #define se second
  10. #define pb push_back
  11. #define pf push_front
  12. #define ll long long
  13. #define N 100000
  14. #define sz(x) (x).size()
  15. #define all(v) (v).begin(), (v).end()
  16. #define FOR(a,b,c) for(int a=b;a<=c;++a)
  17. #define FORE(a,b,c) for(int a=b;a>=c;--a)
  18. #define __Art__ signed main()
  19. #define  NAME  "sor"
  20. using namespace std;
  21. void sol(){
  22.     long double k[] = {0.0, 10.0, 5.0, 10.0, 5.0, 2.0, 5.0, 10.0, 5.0, 10.0};
  23.     long double l;
  24.     cin >> l;
  25.     if ((int)l == l) return cout << 1, void();
  26.     ostringstream oss;
  27.     oss << setprecision(19) << l;
  28.     string a = oss.str();
  29.     int r = 1;
  30.     while (a[sz(a) - 1] == '0') a.erase(sz(a) - 1, 1);
  31.     while (1){
  32.         if ((int) l == l) return cout << r, void();
  33.         l *= k[a[sz(a) - 1] - 48];
  34.         r *= k[a[sz(a) - 1] - 48];
  35.         oss << setprecision(19) << l;
  36.         a = oss.str();
  37.         while (a[sz(a) - 1] == '0') a.erase(sz(a) - 1, 1);
  38.     }
  39. }
  40. __Art__{
  41.     if (fopen(NAME".INP", "r")) {
  42.         freopen(NAME".INP", "r", stdin);
  43.         freopen(NAME".ANS", "w", stdout);
  44.     }
  45.     inout();
  46.     int t = 1;
  47.     //cin >> t;
  48.     while (t--) sol();
  49.     return (0 ^ 0);
  50. }
  51.  
Success #stdin #stdout 0s 5312KB
comments (?)
stdin 
1.23
stdout 
100
https://ideone.com/RlncqI
language:
C++14 (gcc 8.3)
created:
2 years ago
visibility:
public

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