結果

問題 No.2214 Products on Tree
ユーザー woodywoodywoodywoody
提出日時 2023-02-12 01:44:32
言語 C++14
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 155 ms / 3,000 ms
コード長 4,383 bytes
コンパイル時間 4,411 ms
コンパイル使用メモリ 234,424 KB
実行使用メモリ 34,324 KB
最終ジャッジ日時 2023-09-22 20:25:56
合計ジャッジ時間 9,152 ms
ジャッジサーバーID
（参考情報） 		judge14 / judge12
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 2 ms
4,380 KB
testcase_01 AC 1 ms
4,376 KB
testcase_02 AC 1 ms
4,376 KB
testcase_03 AC 134 ms
24,096 KB
testcase_04 AC 146 ms
24,356 KB
testcase_05 AC 126 ms
23,448 KB
testcase_06 AC 91 ms
17,320 KB
testcase_07 AC 19 ms
7,352 KB
testcase_08 AC 13 ms
5,956 KB
testcase_09 AC 27 ms
8,628 KB
testcase_10 AC 82 ms
16,500 KB
testcase_11 AC 36 ms
10,280 KB
testcase_12 AC 44 ms
11,480 KB
testcase_13 AC 148 ms
25,084 KB
testcase_14 AC 155 ms
24,980 KB
testcase_15 AC 150 ms
25,052 KB
testcase_16 AC 154 ms
25,128 KB
testcase_17 AC 150 ms
25,076 KB
testcase_18 AC 68 ms
19,308 KB
testcase_19 AC 76 ms
20,656 KB
testcase_20 AC 67 ms
19,008 KB
testcase_21 AC 47 ms
15,380 KB
testcase_22 AC 99 ms
25,056 KB
testcase_23 AC 2 ms
4,376 KB
testcase_24 AC 1 ms
4,380 KB
testcase_25 AC 1 ms
4,376 KB
testcase_26 AC 1 ms
4,380 KB
testcase_27 AC 2 ms
4,380 KB
testcase_28 AC 61 ms
26,072 KB
testcase_29 AC 19 ms
8,364 KB
testcase_30 AC 66 ms
25,816 KB
testcase_31 AC 98 ms
25,736 KB
testcase_32 AC 93 ms
25,900 KB
testcase_33 AC 87 ms
34,248 KB
testcase_34 AC 83 ms
34,324 KB
testcase_35 AC 126 ms
29,564 KB
testcase_36 AC 122 ms
29,784 KB
testcase_37 AC 77 ms
24,940 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>
#include<atcoder/all>
#define rep(i,b) for(int i=0;i<b;i++)
#define rrep(i,b) for(int i=b-1;i>=0;i--)
#define rep1(i,b) for(int i=1;i<b;i++)
#define repx(i,x,b) for(int i=x;i<b;i++)
#define rrepx(i,x,b) for(int i=b-1;i>=x;i--)
#define fore(i,a) for(auto i:a)
#define fore1(i,a) for(auto &i:a)
#define rng(x) (x).begin(), (x).end()
#define rrng(x) (x).rbegin(), (x).rend()
#define sz(x) ((int)(x).size())
#define pb push_back
#define fi first
#define se second
#define pcnt __builtin_popcountll

using namespace std;
using namespace atcoder;

using ll = long long;
using ld = long double;
template<typename T> using mpq = priority_queue<T, vector<T>, greater<T>>;
template<typename T> bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<typename T> bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }
template<typename T> ll sumv(const vector<T>&a){ll res(0);for(auto&&x:a)res+=x;return res;}
bool yn(bool a) { if(a) {cout << "Yes" << endl; return true;} else {cout << "No" << endl; return false;}}
#define dame { cout << "No" << endl; return;}
#define dame1 { cout << -1 << endl; return;}
#define cout2(x,y) cout << x << " " << y << endl;
#define coutp(p) cout << p.fi << " " << p.se << endl;
#define out cout << ans << endl;
#define outd cout << fixed << setprecision(20) << ans << endl;
#define outm cout << ans.val() << endl;
#define outv fore(yans , ans) cout << yans << "\n";
#define outdv fore(yans , ans) cout << yans.val() << "\n";
#define coutv(v) {fore(vy , v) {cout << vy << " ";} cout << endl;}
#define coutv2(v) fore(vy , v) cout << vy << "\n";
#define coutvm(v) {fore(vy , v) {cout << vy.val() << " ";} cout << endl;}
#define coutvm2(v) fore(vy , v) cout << vy.val() << "\n";
using pll = pair<ll,ll>;using pil = pair<int,ll>;using pli = pair<ll,int>;using pii = pair<int,int>;using pdd = pair<ld,ld>;
using tp = tuple<int ,int ,int>;
using vi = vector<int>;using vd = vector<ld>;using vl = vector<ll>;using vs = vector<string>;using vb = vector<bool>;
using vpii = vector<pii>;using vpli = vector<pli>;using vpll = vector<pll>;using vpil = vector<pil>;
using vvi = vector<vector<int>>;using vvl = vector<vector<ll>>;using vvs = vector<vector<string>>;using vvb = vector<vector<bool>>;
using vvpii = vector<vector<pii>>;using vvpli = vector<vector<pli>>;using vvpll = vector<vpll>;using vvpil = vector<vpil>;
using mint = modint998244353;
//using mint = modint1000000007;
//using mint = dynamic_modint<0>;
using vm = vector<mint>;
using vvm = vector<vector<mint>>;
vector<int> dx={1,0,-1,0,1,1,-1,-1},dy={0,1,0,-1,1,-1,1,-1};
ll gcd(ll a, ll b) { return a?gcd(b%a,a):b;}
ll lcm(ll a, ll b) { return a/gcd(a,b)*b;}
#define yes {cout <<"Yes"<<endl;}
#define yesr { cout <<"Yes"<<endl; return;}
#define no {cout <<"No"<<endl;}
#define nor { cout <<"No"<<endl; return;}
const double eps = 1e-10;
const ll LINF = 1001002003004005006ll;
const int INF = 1001001001;
#ifdef MY_LOCAL_DEBUG
#define show(x) cerr<<#x<<" = "<<x<<endl
#define showp(p) cerr<<#p<<" = "<<p.fi<<" : "<<p.se<<endl
#define show2(x,y) cerr<<#x<<" = "<<x<<" : "<<#y<<" = "<<y<<endl
#define show3(x,y,z) cerr<<#x<<" = "<<x<<" : "<<#y<<" = "<<y<<" : "<<#z<<" = "<<z<<endl
#define show4(x,y,z,x2) cerr<<#x<<" = "<<x<<" : "<<#y<<" = "<<y<<" : "<<#z<<" = "<<z<<" : "<<#x2<<" = "<<x2<<endl
#define test(x) cout << "test" << x << endl
#define showv(v) {fore(vy , v) {cout << vy << " ";} cout << endl;}
#define showv2(v) fore(vy , v) cout << vy << "\n";
#define showvm(v) {fore(vy , v) {cout << vy.val() << " ";} cout << endl;}
#define showvm2(v) fore(vy , v) cout << vy.val() << "\n";
#else
#define show(x)
#define showp(p)
#define show2(x,y)
#define show3(x,y,z)
#define show4(x,y,z,x2)
#define test(x)
#define showv(v)
#define showv2(v)
#define showvm(v)
#define showvm2(v)
#endif

void solve(){
	int n; cin>>n;
	vvi e(n);
	rep(i,n-1){
		int a,b; cin>>a>>b;
		a--; b--;
		e[a].pb(b);
		e[b].pb(a);
	}

	vvm dp(n , vm(2,1));

	auto dfs = [&](auto dfs,int x,int pre)->void{

		fore(y , e[x]){
			if(y == pre) continue;
	
			dfs(dfs , y ,x);
			dp[x][1] *= (dp[y][0]+dp[y][1]);
			dp[x][1] += dp[x][0]*dp[y][1];
			dp[x][0] *= (dp[y][0]+dp[y][1]);
		}
	
		return;
	};
	dfs(dfs,0,-1);
	mint ans = dp[0][1];
	outm;

	return;
}

int main(){
	ios::sync_with_stdio(false);
	cin.tie(0);

	int t = 1;
	//cin>>t;

	rep(i,t){
		solve();
	}

	return 0;
}
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