結果
問題 | No.1879 How many matchings? |
ユーザー | woodywoody |
提出日時 | 2022-06-17 01:10:28 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
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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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
6,816 KB |
testcase_01 | AC | 2 ms
6,816 KB |
testcase_02 | AC | 1 ms
6,820 KB |
testcase_03 | AC | 1 ms
6,816 KB |
testcase_04 | AC | 2 ms
6,820 KB |
testcase_05 | WA | - |
testcase_06 | WA | - |
testcase_07 | WA | - |
testcase_08 | WA | - |
testcase_09 | WA | - |
testcase_10 | WA | - |
testcase_11 | WA | - |
testcase_12 | WA | - |
testcase_13 | WA | - |
testcase_14 | WA | - |
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 second using 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; }