結果
問題 | No.1378 Flattening |
ユーザー | tokusakurai |
提出日時 | 2021-02-06 11:04:24 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 247 ms / 2,000 ms |
コード長 | 4,396 bytes |
コンパイル時間 | 2,340 ms |
コンパイル使用メモリ | 215,904 KB |
実行使用メモリ | 101,760 KB |
最終ジャッジ日時 | 2024-07-02 18:06:34 |
合計ジャッジ時間 | 7,884 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge2 |
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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
6,812 KB |
testcase_01 | AC | 2 ms
6,944 KB |
testcase_02 | AC | 2 ms
6,940 KB |
testcase_03 | AC | 2 ms
6,940 KB |
testcase_04 | AC | 2 ms
6,940 KB |
testcase_05 | AC | 2 ms
6,940 KB |
testcase_06 | AC | 2 ms
6,944 KB |
testcase_07 | AC | 2 ms
6,944 KB |
testcase_08 | AC | 2 ms
6,940 KB |
testcase_09 | AC | 2 ms
6,944 KB |
testcase_10 | AC | 2 ms
6,944 KB |
testcase_11 | AC | 2 ms
6,940 KB |
testcase_12 | AC | 2 ms
6,944 KB |
testcase_13 | AC | 2 ms
6,940 KB |
testcase_14 | AC | 2 ms
6,940 KB |
testcase_15 | AC | 2 ms
6,940 KB |
testcase_16 | AC | 2 ms
6,940 KB |
testcase_17 | AC | 2 ms
6,944 KB |
testcase_18 | AC | 2 ms
6,944 KB |
testcase_19 | AC | 2 ms
6,940 KB |
testcase_20 | AC | 2 ms
6,940 KB |
testcase_21 | AC | 2 ms
6,940 KB |
testcase_22 | AC | 2 ms
6,944 KB |
testcase_23 | AC | 2 ms
6,940 KB |
testcase_24 | AC | 2 ms
6,944 KB |
testcase_25 | AC | 2 ms
6,940 KB |
testcase_26 | AC | 2 ms
6,940 KB |
testcase_27 | AC | 2 ms
6,940 KB |
testcase_28 | AC | 2 ms
6,944 KB |
testcase_29 | AC | 2 ms
6,944 KB |
testcase_30 | AC | 2 ms
6,944 KB |
testcase_31 | AC | 246 ms
101,632 KB |
testcase_32 | AC | 247 ms
101,760 KB |
testcase_33 | AC | 240 ms
101,632 KB |
testcase_34 | AC | 241 ms
101,632 KB |
testcase_35 | AC | 243 ms
101,760 KB |
testcase_36 | AC | 240 ms
101,632 KB |
testcase_37 | AC | 240 ms
101,760 KB |
testcase_38 | AC | 242 ms
101,760 KB |
testcase_39 | AC | 243 ms
101,760 KB |
testcase_40 | AC | 242 ms
101,632 KB |
testcase_41 | AC | 242 ms
101,632 KB |
testcase_42 | AC | 239 ms
101,760 KB |
testcase_43 | AC | 239 ms
101,632 KB |
testcase_44 | AC | 240 ms
101,632 KB |
testcase_45 | AC | 20 ms
10,624 KB |
testcase_46 | AC | 33 ms
15,616 KB |
testcase_47 | AC | 5 ms
6,940 KB |
testcase_48 | AC | 186 ms
78,976 KB |
testcase_49 | AC | 211 ms
89,088 KB |
testcase_50 | AC | 18 ms
9,344 KB |
testcase_51 | AC | 2 ms
6,940 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; #define rep(i, n) for(int i = 0; i < n; i++) #define rep2(i, x, n) for(int i = x; i <= n; i++) #define rep3(i, x, n) for(int i = x; i >= n; i--) #define each(e, v) for(auto &e: v) #define pb push_back #define eb emplace_back #define all(x) x.begin(), x.end() #define rall(x) x.rbegin(), x.rend() #define sz(x) (int)x.size() using ll = long long; using pii = pair<int, int>; using pil = pair<int, ll>; using pli = pair<ll, int>; using pll = pair<ll, ll>; //const int MOD = 1000000007; const int MOD = 998244353; const int inf = (1<<30)-1; const ll INF = (1LL<<60)-1; template<typename T> bool chmax(T &x, const T &y) {return (x < y)? (x = y, true) : false;}; template<typename T> bool chmin(T &x, const T &y) {return (x > y)? (x = y, true) : false;}; struct io_setup{ io_setup(){ ios_base::sync_with_stdio(false); cin.tie(NULL); cout << fixed << setprecision(15); } } io_setup; template<int mod> struct Mod_Int{ int x; Mod_Int() : x(0) {} Mod_Int(ll y) : x(y >= 0 ? y % mod : (mod - (-y) % mod) % mod) {} Mod_Int &operator += (const Mod_Int &p){ if((x += p.x) >= mod) x -= mod; return *this; } Mod_Int &operator -= (const Mod_Int &p){ if((x += mod - p.x) >= mod) x -= mod; return *this; } Mod_Int &operator *= (const Mod_Int &p){ x = (int) (1LL * x * p.x % mod); return *this; } Mod_Int &operator /= (const Mod_Int &p){ *this *= p.inverse(); return *this; } Mod_Int &operator ++ () {return *this += Mod_Int(1);} Mod_Int operator ++ (int){ Mod_Int tmp = *this; ++*this; return tmp; } Mod_Int &operator -- () {return *this -= Mod_Int(1);} Mod_Int operator -- (int){ Mod_Int tmp = *this; --*this; return tmp; } Mod_Int operator - () const {return Mod_Int(-x);} Mod_Int operator + (const Mod_Int &p) const {return Mod_Int(*this) += p;} Mod_Int operator - (const Mod_Int &p) const {return Mod_Int(*this) -= p;} Mod_Int operator * (const Mod_Int &p) const {return Mod_Int(*this) *= p;} Mod_Int operator / (const Mod_Int &p) const {return Mod_Int(*this) /= p;} bool operator == (const Mod_Int &p) const {return x == p.x;} bool operator != (const Mod_Int &p) const {return x != p.x;} Mod_Int inverse() const { assert(*this != Mod_Int(0)); return pow(mod-2); } Mod_Int pow(ll k) const{ Mod_Int now = *this, ret = 1; for(; k; k >>= 1, now *= now){ if(k&1) ret *= now; } return ret; } friend ostream &operator << (ostream &os, const Mod_Int &p){ return os << p.x; } friend istream &operator >> (istream &is, Mod_Int &p){ ll a; is >> a; p = Mod_Int<mod>(a); return is; } }; using mint = Mod_Int<MOD>; template<typename T> struct Sparse_Table{ using F = function<T(T, T)>; const int n; vector<vector<T>> st; vector<int> lookup; const F f; const T e; Sparse_Table(const vector<T> &table, const F &f, const T &e) : n(sz(table)), f(f), e(e){ int log_n = 32-__builtin_popcount(n); st.assign(log_n, vector<T>(n)); rep(i, n) st[0][i] = table[i]; rep(j, log_n-1){ rep(i, n){ if(i+(1<<j) < n) st[j+1][i] = f(st[j][i], st[j][i+(1<<j)]); else st[j+1][i] = st[j][i]; } } lookup.assign(n+1, -1); rep2(i, 1, n) lookup[i] = lookup[i/2]+1; } T query(int l, int r) const{ if(l >= r) return e; int k = lookup[r-l]; return f(st[k][l], st[k][r-(1<<k)]); } T operator [] (int i) const {return st[0][i];} }; int main(){ int N; cin >> N; vector<int> a(N); rep(i, N) {cin >> a[i]; a[i]--;} vector<int> id(N); rep(i, N) id[a[i]] = i; auto f = [](int a, int b) {return min(a, b);}; Sparse_Table<int> st(a, f, inf); vector<vector<mint>> dp(N+1, vector<mint>(N, 0)); dp[0][0] = 1; rep(i, N){ rep(j, N){ if(j < N-1) dp[i][j+1] += dp[i][j]; int L = i, R = id[a[j]]; if(L > R) swap(L, R); if(st.query(L, R+1) == a[j]) dp[i+1][j] += dp[i][j]; } } cout << accumulate(all(dp[N]), mint(0)) << '\n'; }