Cod sursa(job #2285333)

Utilizator Xutzu358Ignat Alex Xutzu358 Data 18 noiembrie 2018 14:32:08
Problema Factorial Scor 10
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.35 kb
Raporteaza aceasta sursa 
#include <iostream>
#include <fstream>
using namespace std;
ifstream f("fact.in");
ofstream g("fact.out");
int k,num=5,fact,ok=1,ctr=0;
int main()
{
    f >> k;
    if (k==0)
        g << 1;
else {
   fact=k*5;
   while (num<fact) {
        num*=5;
       ctr++;
   }
   fact-=ctr*(ctr-1)/2*5;


       g << fact;
}
    return 0;
}