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  1. #include <iostream>
  2. #include <cmath>
  3. using namespace std;
  4.  
  5. int main()
  6.   {
  7.    unsigned N;
  8.    while(cin>>N)
  9.      {
  10.       unsigned L2=0,L5=0;
  11.       for(unsigned n=2;n<=N;++n)
  12.         {
  13.          unsigned v=n;
  14.          for(;!(v&1);++L2) v>>=1;
  15.          for(;!(v%5);++L5) v/=5;
  16.         }
  17.       cout<<N<<"! ma "<<min(L2,L5)<<" zer na koncu."<<endl;
  18.      }
  19.    return 0;
  20.   }
Success #stdin #stdout 0s 3344KB
comments (?)
stdin
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10
15
20
25
100
1000
10000
stdout
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10! ma 2 zer na koncu.
15! ma 3 zer na koncu.
20! ma 4 zer na koncu.
25! ma 6 zer na koncu.
100! ma 24 zer na koncu.
1000! ma 249 zer na koncu.
10000! ma 2499 zer na koncu.
https://ideone.com/mpdvi7
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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