Cod sursa(job #2968867)
Utilizator | Miclaus Adrian Stefan adimiclaus15 | Data | 22 ianuarie 2023 11:44:22 |
---|---|---|---|
Problema | Factorial | Scor | 50 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva de probleme | Marime | 0.54 kb |
#include<iostream>
#include<fstream>
using namespace std;
int nz(int n)
{
int p = 5, nr = 0;
while(p<=n)
{
nr+=n/p;
p*=5;
}
return nr;
}
int p;
int cb(int k)
{
int st = 1, dr = 1e8, poz = -1;
while(st<=dr)
{
int mij = (st + dr)/2;
if(nz(mij) < k)
{
st = mij + 1;
}
else
{
dr = mij - 1;
poz = mij;
}
}
return poz;
}
int main()
{
ifstream f("fact.in");
ofstream g("fact.out");
f>>p;
g<<cb(p);
}