結果

問題 No.1843 Tree ANDistance
ユーザー ゆにぽけゆにぽけ
提出日時 2023-10-09 09:28:21
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 156 ms / 2,000 ms
コード長 3,270 bytes
コンパイル時間 1,501 ms
コンパイル使用メモリ 131,236 KB
実行使用メモリ 32,580 KB
最終ジャッジ日時 2024-07-26 18:24:45
合計ジャッジ時間 7,054 ms
ジャッジサーバーID
(参考情報)
judge1 / judge5
このコードへのチャレンジ
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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 145 ms
25,540 KB
testcase_01 AC 144 ms
25,540 KB
testcase_02 AC 150 ms
32,580 KB
testcase_03 AC 156 ms
30,408 KB
testcase_04 AC 145 ms
26,056 KB
testcase_05 AC 120 ms
25,576 KB
testcase_06 AC 116 ms
25,412 KB
testcase_07 AC 141 ms
25,408 KB
testcase_08 AC 149 ms
25,544 KB
testcase_09 AC 149 ms
31,688 KB
testcase_10 AC 150 ms
30,656 KB
testcase_11 AC 144 ms
26,176 KB
testcase_12 AC 101 ms
25,188 KB
testcase_13 AC 113 ms
25,280 KB
testcase_14 AC 10 ms
22,080 KB
testcase_15 AC 11 ms
21,956 KB
testcase_16 AC 9 ms
21,960 KB
testcase_17 AC 9 ms
21,952 KB
testcase_18 AC 8 ms
21,956 KB
testcase_19 AC 11 ms
21,956 KB
testcase_20 AC 9 ms
21,824 KB
testcase_21 AC 8 ms
21,956 KB
testcase_22 AC 7 ms
21,960 KB
testcase_23 AC 8 ms
21,824 KB
testcase_24 AC 8 ms
21,828 KB
testcase_25 AC 8 ms
21,952 KB
testcase_26 AC 8 ms
21,828 KB
testcase_27 AC 8 ms
21,952 KB
testcase_28 AC 87 ms
24,644 KB
testcase_29 AC 48 ms
23,748 KB
testcase_30 AC 58 ms
25,924 KB
testcase_31 AC 102 ms
29,384 KB
testcase_32 AC 76 ms
25,280 KB
testcase_33 AC 26 ms
22,720 KB
testcase_34 AC 58 ms
24,128 KB
testcase_35 AC 8 ms
21,828 KB
testcase_36 AC 8 ms
21,828 KB
testcase_37 AC 8 ms
21,824 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<iostream>
#include<vector>
#include<algorithm>
#include<cstring>
#include<cassert>
#include<cmath>
#include<ctime>
#include<iomanip>
#include<numeric>
#include<stack>
#include<queue>
#include<map>
#include<unordered_map>
#include<set>
#include<unordered_set>
#include<bitset>
#include<random>
using namespace std;
template<int m> struct modint
{
	private:
	unsigned int value;
	static constexpr int mod() {return m;}

	public:
	constexpr modint(const long long x = 0) noexcept
	{
		long long y = x;
		if(y < 0 || y >= mod())
		{
			y %= mod();
			if(y < 0) y += mod();
		}
		value = (unsigned int)y;
	}
	constexpr unsigned int val() noexcept {return value;}
	constexpr modint &operator+=(const modint &other) noexcept
	{
		value += other.value;
		if(value >= mod()) value -= mod();
		return *this;
	}
	constexpr modint &operator-=(const modint &other) noexcept
	{
		unsigned int x = value;
		if(x < other.value) x += mod();
		x -= other.value;
		value = x;
		return *this;
	}
	constexpr modint &operator*=(const modint &other) noexcept
	{
		unsigned long long x = value;
		x *= other.value;
		value = (unsigned int) (x % mod());
		return *this;
	}
	constexpr modint &operator/=(const modint &other) noexcept
	{
		return *this *= other.inverse();
	}
	constexpr modint inverse() const noexcept
	{
		assert(value);
		long long a = value,b = mod(),x = 1,y = 0;
		while(b)
		{
			long long q = a/b;
			a -= q*b; swap(a,b);
			x -= q*y; swap(x,y);
		}
		return modint(x);
	}
	constexpr modint power(long long N) const noexcept
	{
		assert(N >= 0);
		modint p = *this,ret = 1;
		while(N)
		{
			if(N & 1) ret *= p;
			p *= p;
			N >>= 1;
		}
		return ret;
	}
	constexpr modint operator+() {return *this;}
	constexpr modint operator-() {return modint() - *this;}
	constexpr modint &operator++(int) noexcept {return *this += 1;}
	constexpr modint &operator--(int) noexcept {return *this -= 1;}
	friend modint operator+(const modint& lhs, const modint& rhs) {return modint(lhs) += rhs;}
	friend modint operator-(const modint& lhs, const modint& rhs) {return modint(lhs) -= rhs;}
	friend modint operator*(const modint& lhs, const modint& rhs) {return modint(lhs) *= rhs;}
	friend modint operator/(const modint& lhs, const modint& rhs) {return modint(lhs) /= rhs;}
	friend ostream &operator<<(ostream &os,const modint &x) {return os << x.value;}
};
//using mint = modint<998244353>;
using mint = modint<1000000007>;
int N;
vector<pair<int,int>> G[1 << 17];
mint dp[1 << 17][30];

void dfs0(int u,int p)
{
	for(auto [v,w]:G[u]) if(v != p)
	{
		dfs0(v,u);
		for(int i = 0;i < 30;i++) dp[u][i] += (w >> i & 1 ? dp[v][i] + 1:0);
	}
}
mint ans;
void dfs1(int u,int p,int pw)
{
	if(p >= 0)
	{
		for(int i = 0;i < 30;i++) if(pw >> i & 1)
		{
			mint pdp = dp[p][i];
			pdp -= dp[u][i]+1;
			dp[u][i] += pdp + 1;
		}
	}
	for(int i = 0;i < 30;i++) ans += dp[u][i]*(1 << i);
	for(auto [v,w]:G[u]) if(v != p) dfs1(v,u,w);
}
void solve()
{
	cin >> N;
	for(int i = 1;i < N;i++)
	{
		int u,v,w;
		cin >> u >> v >> w;
		u--; v--;
		G[u].push_back(make_pair(v,w));
		G[v].push_back(make_pair(u,w));
	}

	dfs0(0,-1);
	ans = 0;
	dfs1(0,-1,0);
	ans /= 2;

	cout << ans << endl;
}
int main()
{
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	int tt = 1;
	//cin >> tt;
	while(tt--) solve();
}
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