140232025-01-09 17:36:41ubormaciToronyépítés (1,1,3,3)cpp17Elfogadva 50/5018ms8244 KiB
#include <iostream>
#include <algorithm>
#include <vector>
#include <map>
#include <set>
#include <cmath>
#include <array>
#include <string>
#include <cstdio>
#include <iterator>
#include <unordered_set>
#include <cstdint>
#include <queue>
#include <stack>
#include <deque>
#include <numeric>
#include <fstream>
using namespace std;

template<typename A, typename B> ostream& operator<<(ostream &os, const pair<A, B> &p) { return os << '(' << p.first << ", " << p.second << ')'; }
template<typename T_container, typename T = typename enable_if<!is_same<T_container, string>::value, typename T_container::value_type>::type> ostream& operator<<(ostream &os, const T_container &v) { os << '{'; string sep; for (const T &x : v) os << sep << x, sep = ", "; return os << '}'; }
void dbg_out() { cout << endl; }
template<typename Head, typename... Tail> void dbg_out(Head H, Tail... T) { cout << ' ' << H; dbg_out(T...); }
#ifdef LOCAL
#define dbg(...) cout << "(" << #__VA_ARGS__ << "):", dbg_out(__VA_ARGS__)
#else
#define dbg(...)
#endif

/*

notes:

int64_t
stoi(string s) -> string to int
to_string() -> int (or else) to string

vector declaration:
vector<ll> v(n, 0)
vector<vector<ll>> v(n, vector<ll>(n, 0));

{if statement} ? {truth value} : {false value}

set lower bound/upper bound:
 	// . . . m1 . . . d . . . . m2
    auto m1_it = b.lower_bound(d);
    advance(m1_it, -1);
    m1 = *m1_it;
	m2 = *b.upper_bound(d);

#ifdef LOCAL
    freopen("in.txt","r",stdin);
    freopen("out.txt","w",stdout);
#endif

constexpr auto lcm(auto x, auto... xs)
{
	return ((x = std::lcm(x, xs)), ...);
}

std::gcd(int a, int b)

*/

typedef long long ll;

const ll md = 20210108;

void solve() {
    
    ll n;
    cin >> n;
    vector<ll> dp(n+1, 0);
    dp[1] = 2;
    dp[3] = 2;
    for(ll i = 1; i <= n; i++) {
        dp[i] += 2 * dp[i-1];
        dp[i] = dp[i] % md;
        if(i >= 3) {
            dp[i] += 2 * dp[i-3];
            dp[i] = dp[i] % md;
        }
    }

    cout << dp[n];

}

int main()
{
	std::ios_base::sync_with_stdio(false);

	solve();

	return 0;
}
RészfeladatÖsszpontTesztVerdiktIdőMemória
base50/50
1Elfogadva0/01ms316 KiB
2Elfogadva0/01ms316 KiB
3Elfogadva3/31ms316 KiB
4Elfogadva3/31ms316 KiB
5Elfogadva4/41ms316 KiB
6Elfogadva4/41ms316 KiB
7Elfogadva4/418ms8244 KiB
8Elfogadva4/43ms1332 KiB
9Elfogadva4/41ms316 KiB
10Elfogadva4/41ms508 KiB
11Elfogadva4/44ms1900 KiB
12Elfogadva4/418ms7976 KiB
13Elfogadva4/417ms7056 KiB
14Elfogadva4/47ms2868 KiB
15Elfogadva2/21ms316 KiB
16Elfogadva2/21ms316 KiB