Cod sursa(job #1466255)

Utilizator StefanMudragMudrag Stefan StefanMudrag Data 28 iulie 2015 20:16:00
Problema Factorial Scor 10
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.35 kb
Raporteaza aceasta sursa 
#include<iostream>
#include<fstream>
#include<math.h>
using namespace std;
ifstream fin("fact.in");
ofstream fout("fact.out");
long n,p;

int main()
{
    fin>>p;
    int x;
    int c;
    c=log(5*p)/log(5);
    if(c>=2)
        n=5*p-(c+1)*c/2-c;
    else
        if(p==0)n=1;
        else
        n=5*p;

    fout<<n;
    return 0;
}