結果

問題 No.916 Encounter On A Tree
ユーザー tanimani364tanimani364
提出日時 2020-06-23 19:40:50
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
WA  
実行時間 -
コード長 5,450 bytes
コンパイル時間 2,361 ms
コンパイル使用メモリ 216,944 KB
実行使用メモリ 187,968 KB
最終ジャッジ日時 2024-07-03 19:25:23
合計ジャッジ時間 10,572 ms
ジャッジサーバーID
(参考情報)
judge2 / judge1
このコードへのチャレンジ
(要ログイン)

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
6,940 KB
testcase_02 AC 219 ms
187,716 KB
testcase_03 AC 219 ms
187,840 KB
testcase_04 AC 218 ms
187,716 KB
testcase_05 AC 216 ms
187,708 KB
testcase_06 AC 221 ms
187,844 KB
testcase_07 AC 220 ms
187,840 KB
testcase_08 AC 29 ms
24,884 KB
testcase_09 AC 56 ms
47,416 KB
testcase_10 AC 2 ms
6,940 KB
testcase_11 AC 2 ms
6,940 KB
testcase_12 AC 219 ms
187,716 KB
testcase_13 AC 219 ms
187,712 KB
testcase_14 AC 215 ms
187,716 KB
testcase_15 AC 220 ms
187,716 KB
testcase_16 AC 54 ms
47,420 KB
testcase_17 AC 219 ms
187,716 KB
testcase_18 WA -
testcase_19 WA -
testcase_20 AC 223 ms
187,708 KB
testcase_21 AC 237 ms
187,712 KB
testcase_22 AC 254 ms
187,844 KB
testcase_23 AC 218 ms
187,712 KB
testcase_24 AC 262 ms
187,840 KB
testcase_25 WA -
testcase_26 AC 126 ms
93,632 KB
testcase_27 WA -
testcase_28 AC 65 ms
47,544 KB
testcase_29 AC 225 ms
187,716 KB
testcase_30 AC 259 ms
187,968 KB
testcase_31 AC 229 ms
187,708 KB
testcase_32 AC 240 ms
187,712 KB
testcase_33 AC 128 ms
93,684 KB
testcase_34 AC 60 ms
47,416 KB
testcase_35 WA -
testcase_36 AC 222 ms
187,716 KB
testcase_37 AC 223 ms
187,696 KB
testcase_38 AC 61 ms
47,420 KB
testcase_39 AC 226 ms
187,712 KB
testcase_40 AC 230 ms
187,708 KB
testcase_41 AC 2 ms
6,940 KB
testcase_42 AC 2 ms
6,940 KB
testcase_43 AC 2 ms
6,940 KB
testcase_44 AC 2 ms
6,940 KB
testcase_45 AC 30 ms
24,884 KB
testcase_46 AC 2 ms
6,940 KB
testcase_47 AC 2 ms
6,944 KB
testcase_48 AC 2 ms
6,944 KB
testcase_49 AC 2 ms
6,940 KB
testcase_50 WA -
testcase_51 AC 2 ms
6,940 KB
testcase_52 AC 2 ms
6,940 KB
testcase_53 AC 2 ms
6,944 KB
testcase_54 AC 2 ms
6,944 KB
testcase_55 WA -
testcase_56 AC 2 ms
6,944 KB
testcase_57 AC 2 ms
6,948 KB
testcase_58 AC 3 ms
6,944 KB
testcase_59 AC 5 ms
6,940 KB
testcase_60 AC 9 ms
8,576 KB
権限があれば一括ダウンロードができます

ソースコード

diff #

#include <bits/stdc++.h>
#define rep(i, a) for (int i = (int)0; i < (int)a; ++i)
#define rrep(i, a) for (int i = (int)a - 1; i >= 0; --i)
#define REP(i, a, b) for (int i = (int)a; i < (int)b; ++i)
#define RREP(i, a, b) for (int i = (int)a - 1; i >= b; --i)
#define pb push_back
#define eb emplace_back
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
using ll = long long;
constexpr ll mod = 1e9 + 7;
constexpr ll INF = 1LL << 60;

template <class T>
inline bool chmin(T &a, T b)
{
	if (a > b)
	{
		a = b;
		return true;
	}
	return false;
}
template <class T>
inline bool chmax(T &a, T b)
{
	if (a < b)
	{
		a = b;
		return true;
	}
	return false;
}

ll gcd(ll n, ll m)
{
	ll tmp;
	while (m != 0)
	{
		tmp = n % m;
		n = m;
		m = tmp;
	}
	return n;
}

ll lcm(ll n, ll m)
{
	return abs(n) / gcd(n, m) * abs(m); //gl=xy
}

using namespace std;

template< int mod >
struct ModInt {
  int x;

  ModInt() : x(0) {}

  ModInt(int64_t y) : x(y >= 0 ? y % mod : (mod - (-y) % mod) % mod) {}

  ModInt &operator+=(const ModInt &p) {
    if((x += p.x) >= mod) x -= mod;
    return *this;
  }

  ModInt &operator-=(const ModInt &p) {
    if((x += mod - p.x) >= mod) x -= mod;
    return *this;
  }

  ModInt &operator*=(const ModInt &p) {
    x = (int) (1LL * x * p.x % mod);
    return *this;
  }

  ModInt &operator/=(const ModInt &p) {
    *this *= p.inverse();
    return *this;
  }

  ModInt operator-() const { return ModInt(-x); }

  ModInt operator+(const ModInt &p) const { return ModInt(*this) += p; }

  ModInt operator-(const ModInt &p) const { return ModInt(*this) -= p; }

  ModInt operator*(const ModInt &p) const { return ModInt(*this) *= p; }

  ModInt operator/(const ModInt &p) const { return ModInt(*this) /= p; }

  bool operator==(const ModInt &p) const { return x == p.x; }

  bool operator!=(const ModInt &p) const { return x != p.x; }

  ModInt inverse() const {
    int a = x, b = mod, u = 1, v = 0, t;
    while(b > 0) {
      t = a / b;
      swap(a -= t * b, b);
      swap(u -= t * v, v);
    }
    return ModInt(u);
  }

  ModInt pow(int64_t n) const {
    ModInt ret(1), mul(x);
    while(n > 0) {
      if(n & 1) ret *= mul;
      mul *= mul;
      n >>= 1;
    }
    return ret;
  }

  friend ostream &operator<<(ostream &os, const ModInt &p) {
    return os << p.x;
  }

  friend istream &operator>>(istream &is, ModInt &a) {
    int64_t t;
    is >> t;
    a = ModInt< mod >(t);
    return (is);
  }

  static int get_mod() { return mod; }
};

using modint = ModInt< mod >;
template< typename T >
struct Combination {
  vector< T > _fact, _rfact, _inv;

  Combination(int sz) : _fact(sz + 1), _rfact(sz + 1), _inv(sz + 1) {
    _fact[0] = _rfact[sz] = _inv[0] = 1;
    for(int i = 1; i <= sz; i++) _fact[i] = _fact[i - 1] * i;
    _rfact[sz] /= _fact[sz];
    for(int i = sz - 1; i >= 0; i--) _rfact[i] = _rfact[i + 1] * (i + 1);
    for(int i = 1; i <= sz; i++) _inv[i] = _rfact[i] * _fact[i - 1];
  }

  inline T fact(int k) const { return _fact[k]; }

  inline T rfact(int k) const { return _rfact[k]; }

  inline T inv(int k) const { return _inv[k]; }

  T P(int n, int r) const {
    if(r < 0 || n < r) return 0;
    return fact(n) * rfact(n - r);
  }

  T C(int p, int q) const {
    if(q < 0 || p < q) return 0;
    return fact(p) * rfact(q) * rfact(p - q);
  }

  T H(int n, int r) const {
    if(n < 0 || r < 0) return (0);
    return r == 0 ? 1 : C(n + r - 1, r);
  }
};

template<typename T>
struct LCA{
	const int LOG_N;
	vector<int> depth;//根からの深さ
	vector<vector<T>> g;
	vector<vector<int>> dp;//dp[i][j]:2^i回たどって到達する頂点
	bool flag;

	LCA(vector<vector<T>> &g):g(g),depth(g.size()),LOG_N(log2(g.size())+1){
		dp.assign(LOG_N, vector<int>(g.size(), -1));
		flag = false;
	}

	void dfs(int v,int p,int d){
		dp[0][v] = p;
		depth[v] = d;
		for(auto to:g[v]){
			if(to!=p){
				dfs(to, v, d + 1);
			}
		}
	}

	void init(int root=0){
		flag = true;
		dfs(root, -1, 0);
		for (int k = 0; k + 1 < LOG_N;++k){
			for (int i = 0; i < dp[0].size();++i){
				if(dp[k][i]==-1){
					dp[k + 1][i] = -1;
				}
				else{
					dp[k + 1][i] = dp[k][dp[k][i]];
				}
			}
		}
	}

	int query(int u,int v){
		assert(flag);
		if (depth[u] > depth[v])
		{
			swap(u, v);
		}
		for (int i = LOG_N - 1; i >= 0;--i){
			if(((depth[v]-depth[u])>>i)&1)
				v = dp[i][v];//uとvを同じ高さにする
		}
		if(u==v)
			return u;
		for (int i = LOG_N - 1; i >= 0;--i){
			if(dp[i][u]!=dp[i][v]){//uとvが衝突するまでuとvを登らせる
				u = dp[i][u];
				v = dp[i][v];
			}
		}
		return dp[0][u];
	}
};


void solve()
{
  int d,l,r,k;
  cin>>d>>l>>r>>k;
  int ld=(int)log2(l),rd=(int)log2(r);
  vector<vector<int>>g((1<<d));
  rep(i,1<<(d-1)-1){
    g[i].pb(i*2+1);
    g[i*2+1].pb(i);
    g[i].pb(i*2+2);
    g[i*2+2].pb(i);
  }
  LCA<int>lca(g);
  lca.init(0);
  int cmp=(1<<rd)-1;
  int dis=0;
  //cout<<(1<<ld)-1<<" "<<(1<<(ld+1))-1<<"\n";
  REP(i,(1<<ld)-1,(1<<ld+1)-1){
    //if(i==cmp)continue;
    int z=lca.query(i,cmp);
    //cout<<z<<" "<<(ld+rd-2*((int)log2(z+1)))<<endl;
    if((ld+rd-2*((int)log2(z+1)))==k)++dis;
  }
  //cout<<dis<<"\n";
  modint ans=0,x=2;
  ans+=x.pow(rd)*dis;
  vector<int>cnt(d);
  cnt[ld]++;cnt[rd]++;
  Combination<modint>c((1<<d)+5);
  rep(i,d){
    int z=(1<<i)-cnt[i];
    ans*=c.fact(z);
  }
  cout<<ans<<"\n";
}

int main()
{
	ios::sync_with_stdio(false);
	cin.tie(0);
	cout << fixed << setprecision(15);
	solve();
	return 0;
}
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