結果
問題 | No.916 Encounter On A Tree |
ユーザー |
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提出日時 | 2019-10-25 22:31:14 |
言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 31 ms / 2,000 ms |
コード長 | 5,634 bytes |
コンパイル時間 | 2,019 ms |
コンパイル使用メモリ | 175,760 KB |
実行使用メモリ | 20,868 KB |
最終ジャッジ日時 | 2024-09-13 04:43:34 |
合計ジャッジ時間 | 5,460 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 5 |
other | AC * 56 |
ソースコード
#include<bits/stdc++.h>using namespace std;#define endl '\n'#define ALL(a) (a).begin(),(a).end()#define ALLR(a) (a).rbegin(),(a).rend()#define spa << " " <<#define test cout<<"test"<<endl;#define fi first#define se second#define MP make_pair#define PB push_back#define EB emplace_back#define rep(i,n,m) for(ll i = n; i < (ll)(m); i++)#define rrep(i,n,m) for(ll i = m - 1; i >= (ll)(n); i--)using ll = long long;using ld = long double;const ll MOD = 1e9+7;//const ll MOD = 998244353;const ll INF = 1e18;using P = pair<ll, ll>;template<typename T>void chmin(T &a,T b){if(a>b)a=b;}template<typename T>void chmax(T &a,T b){if(a<b)a=b;}void pmod(ll &a,ll b){a=(a+b)%MOD;}void pmod(ll &a,ll b,ll c){a=(b+c)%MOD;}void qmod(ll &a,ll b){a=(a*b)%MOD;}void qmod(ll &a,ll b,ll c){a=(b*c)%MOD;}ll median(ll a,ll b, ll c){return a+b+c-max({a,b,c})-min({a,b,c});}void ans1(bool x){if(x) cout<<"Yes"<<endl;else cout<<"No"<<endl;}void ans2(bool x){if(x) cout<<"YES"<<endl;else cout<<"NO"<<endl;}void ans3(bool x){if(x) cout<<"Yay!"<<endl;else cout<<":("<<endl;}template<typename T1,typename T2>void ans(bool x,T1 y,T2 z){if(x)cout<<y<<endl;else cout<<z<<endl;}template<typename T>void debug(vector<vector<T>>&v,ll h,ll w){for(ll i=0;i<h;i++){cout<<v[i][0];for(ll j=1;j<w;j++)cout spa v[i][j];cout<<endl;}};void debug(vector<string>&v,ll h,ll w){for(ll i=0;i<h;i++){for(ll j=0;j<w;j++)cout<<v[i][j];cout<<endl;}};template<typename T>void debug(vector<T>&v,ll n){if(n!=0)cout<<v[0];for(ll i=1;i<n;i++)cout spa v[i];cout<<endl;};template<typename T>vector<vector<T>>vec(ll x, ll y, T w){vector<vector<T>>v(x,vector<T>(y,w));return v;}ll gcd(ll x,ll y){ll r;while(y!=0&&(r=x%y)!=0){x=y;y=r;}return y==0?x:y;}vector<ll>dx={1,0,-1,0,1,1,-1,-1};vector<ll>dy={0,1,0,-1,1,-1,1,-1};template<typename T>vector<T> make_v(size_t a,T b){return vector<T>(a,b);}template<typename... Ts>auto make_v(size_t a,Ts... ts){return vector<decltype(make_v(ts...))>(a,make_v(ts...));}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(ll sz) : _fact(sz + 1), _rfact(sz + 1), _inv(sz + 1) {_fact[0] = _rfact[sz] = _inv[0] = 1;for(ll i = 1; i <= sz; i++) _fact[i] = _fact[i - 1] * i;_rfact[sz] /= _fact[sz];for(ll i = sz - 1; i >= 0; i--) _rfact[i] = _rfact[i + 1] * (i + 1);for(ll i = 1; i <= sz; i++) _inv[i] = _rfact[i] * _fact[i - 1];}inline T fact(ll k) const { return _fact[k]; }inline T rfact(ll k) const { return _rfact[k]; }inline T inv(ll k) const { return _inv[k]; }T P(ll n, ll r) const {if(r < 0 || n < r) return 0;return fact(n) * rfact(n - r);}T C(ll p, ll q) const {if(q < 0 || p < q) return 0;return fact(p) * rfact(q) * rfact(p - q);}T H(ll n, ll r) const {if(n < 0 || r < 0) return (0);return r == 0 ? 1 : C(n + r - 1, r);}};using Comb=Combination<modint>;int main(){cin.tie(nullptr);ios_base::sync_with_stdio(false);//cout<<fixed<<setprecision(10);ll res=0,buf=0;bool judge = true;ll d,l,r,k;cin>>d>>l>>r>>k;ll ld=-1,rd=-1;while(l){l/=2;ld++;}while(r){r/=2;rd++;}if(ld>rd)swap(ld,rd);modint ret=1;Comb comb(1500000);rep(i,0,d){if(i!=ld&&i!=rd){ret*=comb.P(1<<i,1<<i);}else if(i!=ld||i!=rd){ret*=comb.P((1<<i)-1,(1<<i)-1);}else ret*=comb.P((1<<i)-2,(1<<i)-2);}judge=false;rep(i,0,ld+1){if(ld-i+rd-i==k){judge=true;//cout<<ret spa i spa ld spa rd<<endl;ll x=ld-i,y=rd-i;//cout<<x spa y<<endl;if(ld==rd){ret*=1<<i;ret*=1<<x;//cout<<ret<<endl;ret*=1<<x-1;}else if(ld==i){ret*=1<<i;ret*=1<<x;ret*=1<<y;}else{ret*=1<<i;ret*=1<<x;ret*=1<<y-1;}break;}}if(judge)cout<<ret<<endl;else cout<<0<<endl;return 0;}