結果

問題 No.2205 Lights Out on Christmas Tree
ユーザー mikammikam
提出日時 2023-02-03 22:24:38
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 80 ms / 2,000 ms
コード長 3,717 bytes
コンパイル時間 4,488 ms
コンパイル使用メモリ 267,444 KB
実行使用メモリ 26,240 KB
最終ジャッジ日時 2024-07-02 20:28:29
合計ジャッジ時間 7,482 ms
ジャッジサーバーID
(参考情報)
judge1 / judge3
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
5,248 KB
testcase_01 AC 2 ms
5,376 KB
testcase_02 AC 2 ms
5,376 KB
testcase_03 AC 2 ms
5,376 KB
testcase_04 AC 1 ms
5,376 KB
testcase_05 AC 2 ms
5,376 KB
testcase_06 AC 2 ms
5,376 KB
testcase_07 AC 2 ms
5,376 KB
testcase_08 AC 1 ms
5,376 KB
testcase_09 AC 2 ms
5,376 KB
testcase_10 AC 1 ms
5,376 KB
testcase_11 AC 60 ms
17,336 KB
testcase_12 AC 61 ms
17,460 KB
testcase_13 AC 61 ms
17,296 KB
testcase_14 AC 54 ms
17,336 KB
testcase_15 AC 76 ms
26,240 KB
testcase_16 AC 47 ms
12,544 KB
testcase_17 AC 43 ms
12,544 KB
testcase_18 AC 2 ms
5,376 KB
testcase_19 AC 66 ms
17,468 KB
testcase_20 AC 68 ms
16,792 KB
testcase_21 AC 71 ms
16,768 KB
testcase_22 AC 63 ms
17,740 KB
testcase_23 AC 68 ms
16,992 KB
testcase_24 AC 67 ms
17,100 KB
testcase_25 AC 66 ms
16,332 KB
testcase_26 AC 80 ms
15,912 KB
testcase_27 AC 66 ms
17,792 KB
testcase_28 AC 60 ms
17,792 KB
testcase_29 AC 61 ms
17,920 KB
testcase_30 AC 74 ms
16,000 KB
testcase_31 AC 66 ms
17,536 KB
testcase_32 AC 63 ms
16,748 KB
testcase_33 AC 63 ms
16,608 KB
testcase_34 AC 61 ms
17,016 KB
testcase_35 AC 68 ms
16,128 KB
testcase_36 AC 70 ms
16,216 KB
testcase_37 AC 66 ms
17,024 KB
testcase_38 AC 76 ms
15,896 KB
testcase_39 AC 65 ms
17,304 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 <atcoder/all>
using namespace atcoder;
#include <bits/stdc++.h>
using namespace std;
// #include <boost/multiprecision/cpp_int.hpp>
#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define rep2(i,a,b) for (int i = (int)(a); i < (int)(b); i++)
#define all(v) v.begin(),v.end()
#define inc(x,l,r) ((l)<=(x)&&(x)<(r)) 
#define Unique(x) sort(all(x)), x.erase(unique(all(x)), x.end())
#define pcnt __builtin_popcountll
typedef long long ll;
#define int ll
using ld = long double;
using vi = vector<int>;
using vs = vector<string>;
using P = pair<int,int>;
using vp = vector<P>;
// using Bint = boost::multiprecision::cpp_int;
template<typename T1,typename T2> bool chmax(T1 &a, const T2 b) {if (a < b) {a = b; return true;} else return false; }
template<typename T1,typename T2> bool chmin(T1 &a, const T2 b) {if (a > b) {a = b; return true;} else return false; }
template<typename T> using priority_queue_greater = priority_queue<T, vector<T>, greater<T>>;
template<typename T> ostream &operator<<(ostream &os,const vector<T> &v){rep(i,v.size())os<<v[i]<<(i+1!=v.size()?" ":"");return os;}
template<typename T> istream &operator>>(istream& is,vector<T> &v){for(T &in:v)is>>in;return is;}
template<typename T1,typename T2> ostream &operator<< (ostream &os, const pair<T1,T2> &p){os << p.first <<" "<<p.second;return os;}
ostream &operator<< (ostream &os, const modint1000000007 &m){os << m.val();return os;}
istream &operator>> (istream &is, modint1000000007 &m){ll in;is>>in;m=in;return is;}
ostream &operator<< (ostream &os, const modint998244353 &m){os << m.val();return os;}
istream &operator>> (istream &is, modint998244353 &m){ll in;is>>in;m=in;return is;}
template<class... T> void input(T&... a){(cin>> ... >> a);}
template<class T> void print(T& a){cout <<a<< '\n';}
template<class T,class... Ts> void print(const T&a, const Ts&... b){cout<< a;(cout<<...<<(cout<<' ',b));cout<<'\n';}
#define VI(v,n) vi v(n); input(v)
#define INT(...) int __VA_ARGS__; input(__VA_ARGS__)
#define STR(...) string __VA_ARGS__; input(__VA_ARGS__)
#define CHAR(...) char __VA_ARGS__; input(__VA_ARGS__)
int sign(int x){return x>0?1:x<0?-1:0;}
int ceil(int x,int y){assert(y!=0);if(sign(x)==sign(y))return (x+y-1)/y;return -((-x/y));}
int floor(int x,int y){assert(y!=0);if(sign(x)==sign(y))return x/y;if(y<0)x*=-1,y*=-1;return x/y-(x%y<0);}
int abs(int x,int y){return abs(x-y);}
bool ins(string s,string t){return s.find(t)!=string::npos;}
P operator+ (const P &p, const P &q){ return P{p.first+q.first,p.second+q.second};}
P operator- (const P &p, const P &q){ return P{p.first-q.first,p.second-q.second};}
void yesno(bool ok,string y="Yes",string n="No"){ cout<<(ok?y:n)<<endl;}
void YESNO(bool ok,string y="YES",string n="NO"){ cout<<(ok?y:n)<<endl;}
int di[]={-1,0,1,0,-1,-1,1,1};
int dj[]={0,1,0,-1,-1,1,-1,1};
const ll INF = 8e18;
//using mint = modint1000000007;
//using mint = modint998244353;
//mint stom(const string &s,int b=10){mint res = 0;for(auto c:s)res *= b,res += c-'0';return res;}

signed main() {
    cin.tie(0);
    ios_base::sync_with_stdio(false);
    cout << fixed << setprecision(20);

    INT(n);
    vector<vi> G(n);
    rep(i,n-1){
        INT(a,b);
        --a;--b;
        G[a].push_back(b);
        G[b].push_back(a);
    }
    vi c(n);cin>>c;
    int ans = 0;
    auto dfs = [&](auto f,int cu,int pa) -> void {
        for(auto v:G[cu]){
            if(v==pa)continue;
            f(f,v,cu);
            if(c[v]==0){
                c[v]^=1;
                c[cu]^=1;
                ans++;
            }
        }
    };
    dfs(dfs,0,-1);
    if(c[0]==0)ans=-1;
    print(ans);
    return 0;
}
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