結果
問題 | No.2822 Lights Up! (Tree Edition) |
ユーザー |
![]() |
提出日時 | 2024-07-03 21:52:15 |
言語 | C++17(gcc12) (gcc 12.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 123 ms / 2,000 ms |
コード長 | 4,348 bytes |
コンパイル時間 | 20,049 ms |
コンパイル使用メモリ | 267,680 KB |
最終ジャッジ日時 | 2025-02-22 01:55:20 |
ジャッジサーバーID (参考情報) |
judge5 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 2 |
other | AC * 142 |
ソースコード
#pragma GCC target("avx2") #pragma GCC optimize("O3") #pragma GCC optimize("unroll-loops") #include <algorithm> #include <atcoder/all> #include <bitset> #include <cassert> #include <cmath> #include <ctime> #include <functional> #include <iomanip> #include <iostream> #include <map> #include <queue> #include <random> #include <set> #include <stack> #include <string> #include <tuple> #include <unordered_map> #include <unordered_set> #include <utility> #include <vector> using namespace std; using namespace atcoder; typedef long long ll; #define rep(i, n) for (int i = 0; i < (int)(n); i++) #define repr(i, n) for (int i = (int)(n) - 1; i >= 0; i--) #define repk(i, k, n) for (int i = k; i < (int)(n); i++) #define all(v) v.begin(), v.end() #define mod1 1000000007 #define mod2 998244353 #define mod3 100000007 #define vi vector<int> #define vs vector<string> #define vc vector<char> #define vl vector<ll> #define vb vector<bool> #define vvi vector<vector<int>> #define vvc vector<vector<char>> #define vvl vector<vector<ll>> #define vvb vector<vector<bool>> #define vvvi vector<vector<vector<int>>> #define vvvl vector<vector<vector<ll>>> #define pii pair<int, int> #define pil pair<int, ll> #define pli pair<ll, int> #define pll pair<ll, ll> #define vpii vector<pair<int, int>> #define vpll vector<pair<ll, ll>> #define vvpii vector<vector<pair<int, int>>> #define vvpll vector<vector<pair<ll, ll>>> using mint = modint998244353; template <typename T> void debug(T e) { cerr << e << endl; } template <typename T> void debug(vector<T> &v) { rep(i, v.size()) { cerr << v[i] << " "; } cerr << endl; } template <typename T> void debug(vector<vector<T>> &v) { rep(i, v.size()) { rep(j, v[i].size()) { cerr << v[i][j] << " "; } cerr << endl; } } template <typename T> void debug(vector<pair<T, T>> &v) { rep(i, v.size()) { cerr << v[i].first << " " << v[i].second << endl; } } template <typename T> void debug(set<T> &st) { for (auto itr = st.begin(); itr != st.end(); itr++) { cerr << *itr << " "; } cerr << endl; } template <typename T> void debug(multiset<T> &ms) { for (auto itr = ms.begin(); itr != ms.end(); itr++) { cerr << *itr << " "; } cerr << endl; } template <typename T> void debug(map<T, T> &mp) { for (auto itr = mp.begin(); itr != mp.end(); itr++) { cerr << itr->first << " " << itr->second << endl; } } void debug_out() { cerr << endl; } template <typename Head, typename... Tail> void debug_out(Head H, Tail... T) { cerr << H << " "; debug_out(T...); } void dfs(vector<bool> &isvisited, vector<vector<pll>> &graph, vector<ll> &e_cols, vector<ll> &v_cols, ll v) { isvisited[v] = true; ll col = 0; ll next_col = 0; for (ll i = 0; i < graph[v].size(); i++) { ll x = graph[v][i].first; ll x_col = e_cols[graph[v][i].second]; if (isvisited[x]) { col = x_col; continue; } else { next_col ^= x_col; dfs(isvisited, graph, e_cols, v_cols, x); } } v_cols[v] = col ^ next_col; } int main() { ll N; cin >> N; vector<ll> P(N - 1); for (ll i = 0; i < N - 1; i++) { cin >> P[i]; P[i]--; } string S; cin >> S; vector<ll> e_cols(N - 1, 0); for (ll i = 0; i < N - 1; i++) { if (S[i] == '#') { e_cols[i] = 1; } } ll Q; cin >> Q; vector<ll> U(Q); vector<ll> V(Q); for (ll i = 0; i < Q; i++) { cin >> U[i] >> V[i]; U[i]--; V[i]--; } vector<vector<pll>> graph(N, vector<pll>(0)); for (ll i = 0; i < N - 1; i++) { graph[i + 1].push_back(pll(P[i], i)); graph[P[i]].push_back(pll(i + 1, i)); } vector<ll> v_cols(N, -1); vector<bool> isvisited(N, false); dfs(isvisited, graph, e_cols, v_cols, 0); // debug(v_cols); dsu tree(N); for (ll i = 0; i < Q; i++) { tree.merge(U[i], V[i]); } vector<ll> cc_cols(N, 0); for (ll i = 0; i < N; i++) { cc_cols[tree.leader(i)] += v_cols[i]; } bool ans = true; for (ll i = 0; i < N; i++) { if (cc_cols[i] % 2 != 0) { ans = false; } } if (ans) { cout << "Yes" << endl; } else { cout << "No" << endl; } }