結果
| 問題 |
No.1598 4×4 Grid
|
| コンテスト | |
| ユーザー |
nrvft
|
| 提出日時 | 2021-07-10 03:39:47 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 868 ms / 4,000 ms |
| コード長 | 3,086 bytes |
| コンパイル時間 | 1,866 ms |
| コンパイル使用メモリ | 199,764 KB |
| 最終ジャッジ日時 | 2025-01-22 23:41:47 |
|
ジャッジサーバーID (参考情報) |
judge4 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 7 |
ソースコード
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
using vl = vector<ll>;
template<class T> using vc = vector<T>;
template<class T> using vvc = vector<vector<T>>;
#define eb emplace_back
#define all(x) (x).begin(), (x).end()
#define rep(i, n) for (ll i = 0; i < (n); i++)
#define repr(i, n) for (ll i = (n)-1; i >= 0; i--)
#define repe(i, l, r) for (ll i = (l); i < (r); i++)
#define reper(i, l, r) for (ll i = (r)-1; i >= (l); i--)
#define repa(i,n) for (auto& i: n)
template<class T1, class T2> inline bool chmax(T1 &a, const T2 &b) {if (a<b) { a=b; return 1;} return 0;}
template<class T1, class T2> inline bool chmin(T1 &a, const T2 &b) {if (b<a) { a=b; return 1;} return 0;}
struct init{init(){cin.tie(0);ios::sync_with_stdio(false);cout<<fixed<<setprecision(15);cerr<<fixed<<setprecision(15);}}init_;
#ifdef DEBUG
template <class T> void verr(const set<T> &st) { repa(a, st) cerr << a << " "; cerr << endl; }
template <class S, class T> void verr(const map<S, T> &mp) { repa(a, mp) cerr << "{" << a.first << ", " << a.second << "} "; cerr << endl; }
template <class S, class T, class N> void verr(const vector<pair<S,T>>& a, const N& n) { rep(i, n) cerr << "{" << a[i].first << ", " << a[i].second << "} "; cerr << endl; }
template <class T, class N> void verr(const vector<T>& a, const N& n) { rep(i, n) cerr << a[i] << " "; cerr << endl; }
ll dbgt = 1; void err() { cerr << "passed " << dbgt++ << endl; }
template<class H, class... T> void err(H&& h,T&&... t){ cerr<< h << (sizeof...(t)?" ":"\n") << flush; if(sizeof...(t)>0) err(forward<T>(t)...); }
#endif
const ll INF = 4e18;
const ld EPS = 1e-11;
const ld PI = acos(-1.0L);
const ll MOD = 1e9 + 7;
// const ll MOD = 998244353;
//--------------------------------------------------------------------------------//
int main() {
ll K;
cin >> K;
vvc<ll> dp(K + 1, vl(1 << 16));
dp[0][0] = 1;
vl dh = {0, 0, 1, -1}, dw = {1, -1, 0, 0};
rep(bit, (1 << 16) - 1){
rep(k, K + 1){
if (dp[k][bit] == 0) continue;
ll dcnt = 0;
rep(i, 16){
if (!(bit >> i & 1)) continue;
ll h = i / 4, w = i % 4;
rep(d, 4) {
ll th = h + dh[d], tw = w + dw[d];
if (th < 0 or th >= 4 or tw < 0 or tw >= 4) continue;
if (bit >> (th * 4 + tw) & 1) continue;
dcnt++;
}
}
rep(i, 16){
if (bit >> i & 1) continue;
ll h = i / 4, w = i % 4, tocnt = dcnt;
rep(d, 4) {
ll th = h + dh[d], tw = w + dw[d];
if (th < 0 or th >= 4 or tw < 0 or tw >= 4) continue;
if (bit >> (th * 4 + tw) & 1) {
tocnt--;
}else{
tocnt++;
}
}
if (k + tocnt <= K) dp[k + tocnt][bit | 1 << i] += dp[k][bit];
}
}
}
cout << dp[K][(1 << 16) - 1] << endl;
}
nrvft