結果

問題 No.916 Encounter On A Tree
ユーザー FF256grhyFF256grhy
提出日時 2019-10-26 00:16:11
言語 C++14
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 13 ms / 2,000 ms
コード長 4,667 bytes
コンパイル時間 1,705 ms
コンパイル使用メモリ 172,208 KB
実行使用メモリ 11,520 KB
最終ジャッジ日時 2024-09-13 11:12:22
合計ジャッジ時間 3,519 ms
ジャッジサーバーID
（参考情報） 		judge1 / judge3
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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
5,248 KB
testcase_01 AC 2 ms
5,248 KB
testcase_02 AC 2 ms
5,376 KB
testcase_03 AC 13 ms
11,520 KB
testcase_04 AC 2 ms
5,376 KB
testcase_05 AC 13 ms
11,500 KB
testcase_06 AC 2 ms
5,376 KB
testcase_07 AC 12 ms
11,516 KB
testcase_08 AC 4 ms
5,376 KB
testcase_09 AC 6 ms
5,376 KB
testcase_10 AC 2 ms
5,376 KB
testcase_11 AC 2 ms
5,376 KB
testcase_12 AC 2 ms
5,376 KB
testcase_13 AC 13 ms
11,392 KB
testcase_14 AC 2 ms
5,376 KB
testcase_15 AC 13 ms
11,392 KB
testcase_16 AC 2 ms
5,376 KB
testcase_17 AC 13 ms
11,388 KB
testcase_18 AC 2 ms
5,376 KB
testcase_19 AC 13 ms
11,520 KB
testcase_20 AC 2 ms
5,376 KB
testcase_21 AC 13 ms
11,392 KB
testcase_22 AC 2 ms
5,376 KB
testcase_23 AC 13 ms
11,412 KB
testcase_24 AC 2 ms
5,376 KB
testcase_25 AC 13 ms
11,396 KB
testcase_26 AC 2 ms
6,944 KB
testcase_27 AC 8 ms
7,316 KB
testcase_28 AC 2 ms
6,944 KB
testcase_29 AC 13 ms
11,444 KB
testcase_30 AC 2 ms
6,944 KB
testcase_31 AC 2 ms
6,940 KB
testcase_32 AC 2 ms
6,944 KB
testcase_33 AC 2 ms
6,944 KB
testcase_34 AC 6 ms
6,944 KB
testcase_35 AC 4 ms
6,944 KB
testcase_36 AC 13 ms
11,444 KB
testcase_37 AC 12 ms
11,392 KB
testcase_38 AC 6 ms
6,940 KB
testcase_39 AC 2 ms
6,940 KB
testcase_40 AC 12 ms
11,412 KB
testcase_41 AC 2 ms
6,940 KB
testcase_42 AC 2 ms
6,940 KB
testcase_43 AC 2 ms
6,944 KB
testcase_44 AC 2 ms
6,940 KB
testcase_45 AC 4 ms
6,940 KB
testcase_46 AC 2 ms
6,940 KB
testcase_47 AC 2 ms
6,944 KB
testcase_48 AC 2 ms
6,940 KB
testcase_49 AC 2 ms
6,944 KB
testcase_50 AC 2 ms
6,944 KB
testcase_51 AC 2 ms
6,940 KB
testcase_52 AC 2 ms
6,944 KB
testcase_53 AC 2 ms
6,940 KB
testcase_54 AC 2 ms
6,940 KB
testcase_55 AC 2 ms
6,944 KB
testcase_56 AC 2 ms
6,940 KB
testcase_57 AC 2 ms
6,940 KB
testcase_58 AC 2 ms
6,940 KB
testcase_59 AC 2 ms
6,944 KB
testcase_60 AC 2 ms
6,944 KB
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ソースコード

diff # 

#include <bits/stdc++.h>
using namespace std;
typedef long long   signed int LL;
typedef long long unsigned int LU;
#define incID(i, l, r) for(LL i = (l)    ; i <  (r); ++i)
#define incII(i, l, r) for(LL i = (l)    ; i <= (r); ++i)
#define decID(i, l, r) for(LL i = (r) - 1; i >= (l); --i)
#define decII(i, l, r) for(LL i = (r)    ; i >= (l); --i)
#define inc(i, n)  incID(i, 0, n)
#define inc1(i, n) incII(i, 1, n)
#define dec(i, n)  decID(i, 0, n)
#define dec1(i, n) decII(i, 1, n)
#define inID(v, l, r) ((l) <= (v) && (v) <  (r))
#define inII(v, l, r) ((l) <= (v) && (v) <= (r))
#define PB push_back
#define EB emplace_back
#define MP make_pair
#define FI first
#define SE second
#define  ALL(v)  v.begin(),  v.end()
#define RALL(v) v.rbegin(), v.rend()
template<typename T> bool setmin  (T & a, T b) { if(b <  a) { a = b; return true; } else { return false; } }
template<typename T> bool setmax  (T & a, T b) { if(b >  a) { a = b; return true; } else { return false; } }
template<typename T> bool setmineq(T & a, T b) { if(b <= a) { a = b; return true; } else { return false; } }
template<typename T> bool setmaxeq(T & a, T b) { if(b >= a) { a = b; return true; } else { return false; } }
LL mo(LL a, LL b) { assert(b > 0); a %= b; if(a < 0) { a += b; } return a; }
LL fl(LL a, LL b) { assert(b > 0); return (a > 0 ? a / b : (a - b + 1) / b); }
LL ce(LL a, LL b) { assert(b > 0); return (a < 0 ? a / b : (a + b - 1) / b); }
template<typename T> T gcd(T a, T b) { return (b == 0 ? a : gcd(b, a % b)); }
template<typename T> T lcm(T a, T b) { return a / gcd(a, b) * b; }
#define bit(b, i) (((b) >> (i)) & 1)
#define BC __builtin_popcountll
#define SC static_cast
#define SI(v) SC<int>(v.size())
#define SL(v) SC<LL >(v.size())
#define RF(e, v) for(auto & e: v)
#define ef else if
#define UR assert(false)

// ---- ----

template<LL M> class ModInt {
private:
	LL v = 0;
public:
	ModInt() { }
	ModInt(LL vv) { setval(vv); }
	ModInt & setval(LL vv) { v = vv % M; if(v < 0) { v += M; } return (*this); }
	LL getval() const { return v; }
	ModInt & operator+=(const ModInt & b)       { return setval(v + b.v); }
	ModInt & operator-=(const ModInt & b)       { return setval(v - b.v); }
	ModInt & operator*=(const ModInt & b)       { return setval(v * b.v); }
	ModInt & operator/=(const ModInt & b)       { return setval(v * b.inv()); }
	ModInt & operator^=(            LU b)       { return setval(ex(v, b)); }
	ModInt   operator+ (                ) const { return ModInt(+v); }
	ModInt   operator- (                ) const { return ModInt(-v); }
	ModInt   operator+ (const ModInt & b) const { return ModInt(v + b.v); }
	ModInt   operator- (const ModInt & b) const { return ModInt(v - b.v); }
	ModInt   operator* (const ModInt & b) const { return ModInt(v * b.v); }
	ModInt   operator/ (const ModInt & b) const { return ModInt(v * b.inv()); }
	ModInt   operator^ (            LU b) const { return ModInt(ex(v, b)); }
	LL inv() const {
		LL x = (ex_gcd(v, M).FI + M) % M;
		assert(v * x % M == 1);
		return x;
	}
	LL ex(LL a, LU b) const {
		LL D = 64, x[64], y = 1;
		inc(i, D) { if((b >> i) == 0) { D = i; break; } }
		inc(i, D) { x[i] = (i == 0 ? a : x[i - 1] * x[i - 1]) % M; }
		inc(i, D) { if((b >> i) & 1) { (y *= x[i]) %= M; } }
		return y;
	}
	pair<LL, LL> ex_gcd(LL a, LL b) const {
		if(b == 0) { return MP(1, 0); }
		auto p = ex_gcd(b, a % b);
		return MP(p.SE, p.FI - (a / b) * p.SE);
	}
};
template<LL M> ModInt<M> operator+(LL a, const ModInt<M> & b) { return  b + a; }
template<LL M> ModInt<M> operator-(LL a, const ModInt<M> & b) { return -b + a; }
template<LL M> ModInt<M> operator*(LL a, const ModInt<M> & b) { return  b * a; }
template<LL M> ModInt<M> operator/(LL a, const ModInt<M> & b) { return  a * b.inv(); }
template<LL M> istream & operator>>(istream & is, ModInt<M> & b) { LL v; is >> v; b.setval(v); return is; }
template<LL M> ostream & operator<<(ostream & os, const ModInt<M> & b) { return (os << b.getval()); }

// ---- ----

typedef ModInt<1'000'000'007> MI;

int D(int i) {
	int c = 0;
	while(i > 0) { i /= 2; c++; }
	return c - 1;
}

int main() {
	int d, l, r, k;
	cin >> d >> l >> r >> k;
	l = D(l);
	r = D(r);
	if(! (l <= r)) { swap(l, r); }
	
	MI ans = 1;
	if((l + r + k) % 2 == 0 && inII(k, r - l, l + r)) {
		vector<MI> f(1 << d);
		inc(i, 1 << d) { f[i] = (i == 0 ? 1 : f[i - 1] * i); }
		inc(i, d) { ans *= f[1 << i]; }
		
		int m = (l + r - k) / 2;
		assert(inII(m, 0, l));
		
		if(l == r) { ans *= MI(1 << (r - m - 1)) / ((1 << r) - 1); }
		ef(l != m) { ans *= MI(1 << (r - m - 1)) / ((1 << r) - 0); }
		else       { ans *= MI(1 << (r - m - 0)) / ((1 << r) - 0); }
	} else {
		ans = 0;
	}
	
	cout << ans << endl;
	
	return 0;
}
0