結果
問題 | No.1879 How many matchings? |
ユーザー |
|
提出日時 | 2022-06-17 01:10:28 |
言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 3,941 bytes |
コンパイル時間 | 3,955 ms |
コンパイル使用メモリ | 243,368 KB |
実行使用メモリ | 6,820 KB |
最終ジャッジ日時 | 2024-10-07 11:41:14 |
合計ジャッジ時間 | 4,569 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
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ファイルパターン | 結果 |
---|---|
other | AC * 5 WA * 10 |
ソースコード
#include<bits/stdc++.h>#include<atcoder/all>#define rep(i,b) for(int i=0;i<b;i++)#define rrep(i,b) for(int i=b-1;i>=0;i--)#define rep1(i,b) for(int i=1;i<b;i++)#define repx(i,x,b) for(int i=x;i<b;i++)#define fore(i,a) for(auto i:a)#define fore1(i,a) for(auto &i:a)#define rng(x) (x).begin(), (x).end()#define rrng(x) (x).rbegin(), (x).rend()#define sz(x) ((int)(x).size())#define pb push_back#define fi first#define se secondusing namespace std;using namespace atcoder;using ll = long long;template<typename T> using mpq = priority_queue<T, vector<T>, greater<T>>;template<typename T> bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }template<typename T> bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }template<typename T> ll sumv(const vector<T>&a){ll res(0);for(auto&&x:a)res+=x;return res;}bool yn(bool a) { if(a) {cout << "Yes" << endl; return 1;} else {cout << "No" << endl; return 0;}}#define dame { cout << "No" << endl; return 0;}#define dame1 { cout << -1 << endl; return 0;}#define test(x) cout << "test" << x << endl;#define deb(x,y) cout << x << " " << y << endl;#define deb3(x,y,z) cout << x << " " << y << " " << z << endl;#define deb4(x,y,z,x2) cout << x << " " << y << " " << z << " " << x2 << endl;#define out cout << ans << endl;#define outv fore(yans , ans) cout << yans << "\n";#define show(x) cerr<<#x<<" = "<<x<<endl;#define showv(v) {fore(vy , v) {cout << vy << " ";} cout << endl;}#define showv2(v) fore(vy , v) cout << vy << "\n";using pll = pair<ll,ll>;using pil = pair<int,ll>;using pli = pair<ll,int>;using pii = pair<int,int>;using tp = tuple<int ,int ,int>;using vi = vector<int>;using vl = vector<ll>;using vs = vector<string>;using vb = vector<bool>;using vpii = vector<pii>;using vpli = vector<pli>;using vpll = vector<pll>;using vpil = vector<pil>;using vvi = vector<vector<int>>;using vvl = vector<vector<ll>>;using vvs = vector<vector<string>>;using vvb = vector<vector<bool>>;using vvpii = vector<vector<pii>>;using vvpli = vector<vector<pli>>;using vvpll = vector<vpll>;using vvpil = vector<vpil>;using mint = modint1000000007;using vm = vector<mint>;using vvm = vector<vector<mint>>;vector<int> dx={1,0,-1,0,1,1,-1,-1},dy={0,1,0,-1,1,-1,1,-1};ll gcd(ll a, ll b) { return a?gcd(b%a,a):b;}ll lcm(ll a, ll b) { return a/gcd(a,b)*b;}const double eps = 1e-10;const ll LINF = 1001002003004005006ll;const int INF = 1001001001;vvm f (vvm a, vvm b){vvm ret(4,vm(4));rep(i,4) rep(j,4) rep(k,4) ret[i][j] += a[i][k] * b[k][j];return ret;}int main(){ll n; cin>>n;vm v(5);// vm v(n+1);v[1] = 1;v[2] = 1;v[3] = 3;v[4] = 2;// repx(i,5,n+1){// v[i] = v[i-2] + v[i-4];// if (i%2 == 1) v[i] += v[i-1];// }// rep(i,n+1){// show(i);// cout << v[i].val() << endl;// }if (n <= 4){cout << v[n].val() << endl;return 0;}vvm a(4,vm(4));vvm b(4,vm(4));vvm c(4,vm(4));a[0][0] = 1;a[0][1] = 1;a[0][2] = 1;a[0][3] = 1;a[1][0] = 1;a[2][1] = 1;a[3][2] = 1;b[0][1] = 1;b[0][2] = 1;b[0][3] = 1;b[1][0] = 1;b[2][1] = 1;b[3][2] = 1;c = f(b,a);// rep(i,4){// rep(j,4) cout << c[i][j].val() << " ";// cout << endl;// }const int logmax = 64;vector<vvm> db(logmax , vvm(4 , vm(4)));db[0] = c;rep1(i,logmax) db[i] = f(db[i-1] , db[i-1]);ll m = (n-4) / 2;vvm now(4,vm(4));rep(i,4) now[i][i] = 1;rep(i,logmax) if ((m >> i & 1) == 1) now = f(now , db[i]);if ((n-4)%2 == 1) now = f(a , now);// rep(i,4){// rep(j,4) cout << now[i][j].val() << " ";// cout << endl;// }mint ans = 0;rep(i,4) ans += v[4-i] * now[0][i];cout << ans.val() << endl;return 0;}