Cod sursa(job #2958514)
Utilizator | Data | 26 decembrie 2022 20:20:20 | |
---|---|---|---|
Problema | Factorial | Scor | 90 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva de probleme | Marime | 0.5 kb |
#include <bits/stdc++.h>
using namespace std;
ifstream fin("fact.in");
ofstream fout("fact.out");
long long n, st, dr, mij, c, z, r;
int main() {
fin >> n;
st = 1;
dr = 10e9;
while(st <= dr) {
mij = st + (dr - st) / 2;
c = mij;
z = 0;
while(c >= 5) {
c /= 5;
z += c;
}
if(z >= n) {
r = mij;
dr = mij - 1;
}
else st = mij + 1;
}
fout << r;
}