Submission #9114526


Source Code Expand

Copy
#include <bits/stdc++.h>

#define INF 1e9
using namespace std;

#define REPR(i, n) for(int i=(n); i >= 0; --i)
#define FOR(i, m, n) for(int i = (m); i < (n); ++i)
#define REP(i, n) for(int i=0, i##_len=(n); i<i##_len; ++i)
#define ALL(a)  (a).begin(),(a).end()

template<class T>
bool chmin(T &a, const T &b) {
    if (b < a) {
        a = b;
        return true;
    }
    return false;
}

template<class T>
bool chmax(T &a, const T &b) {
    if (a < b) {
        a = b;
        return true;
    }
    return false;
}

int gcd(int a, int b) { return b ? gcd(b, a % b) : a; }

typedef long long ll;

ll gcd(ll a, ll b) { return b ? gcd(b, a % b) : a; }


ll Resolve(ll N) {
    ll st5 = 10;
    ll ans = 0;
    while ((st5 / 2) <= N) {
        ans += N / st5;
        st5 *= 5;
    }

    return ans;
}

int main() {
    ll N;
    cin >> N;
    ll ans = ((N % 2) == 0) ? Resolve(N) : 0;
    cout << ans << endl;
    return 0;
}

Submission Info

Submission Time
Task E - Double Factorial
User reud
Language C++14 (GCC 5.4.1)
Score 500
Code Size 981 Byte
Status AC
Exec Time 1 ms
Memory 256 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 500 / 500
Status
AC × 3
AC × 15
Set Name Test Cases
Sample 01.txt, 02.txt, 03.txt
All 01.txt, 02.txt, 03.txt, 11.txt, 12.txt, 13.txt, 14.txt, 15.txt, 16.txt, 17.txt, 18.txt, 19.txt, 20.txt, 21.txt, 22.txt
Case Name Status Exec Time Memory
01.txt AC 1 ms 256 KB
02.txt AC 1 ms 256 KB
03.txt AC 1 ms 256 KB
11.txt AC 1 ms 256 KB
12.txt AC 1 ms 256 KB
13.txt AC 1 ms 256 KB
14.txt AC 1 ms 256 KB
15.txt AC 1 ms 256 KB
16.txt AC 1 ms 256 KB
17.txt AC 1 ms 256 KB
18.txt AC 1 ms 256 KB
19.txt AC 1 ms 256 KB
20.txt AC 1 ms 256 KB
21.txt AC 1 ms 256 KB
22.txt AC 1 ms 256 KB