結果
問題 | No.1610 She Loves Me, She Loves Me Not, ... |
ユーザー | tokusakurai |
提出日時 | 2021-07-21 21:30:23 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 93 ms / 2,000 ms |
コード長 | 2,380 bytes |
コンパイル時間 | 2,015 ms |
コンパイル使用メモリ | 201,744 KB |
最終ジャッジ日時 | 2025-01-23 03:29:38 |
ジャッジサーバーID (参考情報) |
judge5 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 4 |
other | AC * 32 |
ソースコード
#include <bits/stdc++.h> using namespace std; #define rep(i, n) for(int i = 0; i < n; i++) #define rep2(i, x, n) for(int i = x; i <= n; i++) #define rep3(i, x, n) for(int i = x; i >= n; i--) #define each(e, v) for(auto &e: v) #define pb push_back #define eb emplace_back #define all(x) x.begin(), x.end() #define rall(x) x.rbegin(), x.rend() #define sz(x) (int)x.size() using ll = long long; using pii = pair<int, int>; using pil = pair<int, ll>; using pli = pair<ll, int>; using pll = pair<ll, ll>; const int MOD = 1000000007; //const int MOD = 998244353; const int inf = (1<<30)-1; const ll INF = (1LL<<60)-1; template<typename T> bool chmax(T &x, const T &y) {return (x < y)? (x = y, true) : false;}; template<typename T> bool chmin(T &x, const T &y) {return (x > y)? (x = y, true) : false;}; struct io_setup{ io_setup(){ ios_base::sync_with_stdio(false); cin.tie(NULL); cout << fixed << setprecision(15); } } io_setup; template<typename T, bool directed = false> struct Table{ vector<vector<T>> es; const T INF_T; const int n; vector<int> deg; inline const vector<T> &operator [] (int k) const{ return es[k]; } inline vector<T> &operator [] (int k){ return es[k]; } Table(int n) : es(n), INF_T(numeric_limits<T>::max()/2), n(n), deg(n, 0){ for(int i = 0; i < n; i++) es[i].assign(n, INF_T); for(int i = 0; i < n; i++) es[i][i] = 0; } void add_edge(int from, int to, T cost = 1){ es[from][to] = min(es[from][to], cost); if(!directed) es[to][from] = min(es[to][from], cost); deg[from]++, deg[to]++; } void solve(){ queue<int> que; rep(i, n){ if(deg[i] == 1) que.emplace(i); } int ans = 0; while(!empty(que)){ int i = que.front(); que.pop(); if(deg[i] != 1) continue; rep(j, n){ if(es[i][j] == 1){ deg[i]--, deg[j]--; es[i][j] = 0, es[j][i] = 0; if(deg[j] == 1) que.emplace(j); } } ans++; } cout << (ans&1 ? "Yes\n" : "No\n"); } }; int main(){ int N, M; cin >> N >> M; Table<int> G(N); rep(i, M){ int u, v; cin >> u >> v; u--, v--; G.add_edge(u, v); } G.solve(); }