結果
| 問題 | No.1610 She Loves Me, She Loves Me Not, ... | 
| コンテスト | |
| ユーザー |  ei1333333 | 
| 提出日時 | 2021-07-21 21:26:22 | 
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) | 
| 結果 | 
                                AC
                                 
                             | 
| 実行時間 | 4 ms / 2,000 ms | 
| コード長 | 3,761 bytes | 
| コンパイル時間 | 2,177 ms | 
| コンパイル使用メモリ | 203,796 KB | 
| 最終ジャッジ日時 | 2025-01-23 03:27:27 | 
| ジャッジサーバーID (参考情報) | judge2 / judge2 | 
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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;
using int64 = long long;
// const int mod = 1e9 + 7;
const int mod = 31607;
const int64 infll = (1LL << 62) - 1;
const int inf = (1 << 30) - 1;
struct IoSetup {
  IoSetup() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    cout << fixed << setprecision(10);
    cerr << fixed << setprecision(10);
  }
} iosetup;
template< typename T1, typename T2 >
ostream &operator<<(ostream &os, const pair< T1, T2 > &p) {
  os << p.first << " " << p.second;
  return os;
}
template< typename T1, typename T2 >
istream &operator>>(istream &is, pair< T1, T2 > &p) {
  is >> p.first >> p.second;
  return is;
}
template< typename T >
ostream &operator<<(ostream &os, const vector< T > &v) {
  for(int i = 0; i < (int) v.size(); i++) {
    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 >
inline bool chmax(T1 &a, T2 b) { return a < b && (a = b, true); }
template< typename T1, typename T2 >
inline bool chmin(T1 &a, T2 b) { return a > b && (a = b, true); }
template< typename T = int64 >
vector< T > make_v(size_t a) {
  return vector< T >(a);
}
template< typename T, typename... Ts >
auto make_v(size_t a, Ts... ts) {
  return vector< decltype(make_v< T >(ts...)) >(a, make_v< T >(ts...));
}
template< typename T, typename V >
typename enable_if< is_class< T >::value == 0 >::type fill_v(T &t, const V &v) {
  t = v;
}
template< typename T, typename V >
typename enable_if< is_class< T >::value != 0 >::type fill_v(T &t, const V &v) {
  for(auto &e : t) fill_v(e, v);
}
template< typename F >
struct FixPoint : F {
  FixPoint(F &&f) : F(forward< F >(f)) {}
  template< typename... Args >
  decltype(auto) operator()(Args &&... args) const {
    return F::operator()(*this, forward< Args >(args)...);
  }
};
template< typename F >
inline decltype(auto) MFP(F &&f) {
  return FixPoint< F >{forward< F >(f)};
}
template< typename T = int >
struct Edge {
  int from, to;
  T cost;
  int idx;
  Edge() = default;
  Edge(int from, int to, T cost = 1, int idx = -1) : from(from), to(to), cost(cost), idx(idx) {}
  operator int() const { return to; }
};
template< typename T = int >
struct Graph {
  vector< vector< Edge< T > > > g;
  int es;
  Graph() = default;
  explicit Graph(int n) : g(n), es(0) {}
  size_t size() const {
    return g.size();
  }
  void add_directed_edge(int from, int to, T cost = 1) {
    g[from].emplace_back(from, to, cost, es++);
  }
  void add_edge(int from, int to, T cost = 1) {
    g[from].emplace_back(from, to, cost, es);
    g[to].emplace_back(to, from, cost, es++);
  }
  void read(int M, int padding = -1, bool weighted = false, bool directed = false) {
    for(int i = 0; i < M; i++) {
      int a, b;
      cin >> a >> b;
      a += padding;
      b += padding;
      T c = T(1);
      if(weighted) cin >> c;
      if(directed) add_directed_edge(a, b, c);
      else add_edge(a, b, c);
    }
  }
};
template< typename T = int >
using Edges = vector< Edge< T > >;
int main() {
  int N, M;
  cin >> N >> M;
  Graph<> g(N);
  g.read(M);
  int ret = 0;
  queue< int > que;
  vector< int > deg(N), used(N);
  for(int i = 0; i < N; i++) {
    deg[i] = g.g[i].size();
    if(deg[i] == 1) {
      --deg[i];
      que.emplace(i);
    }
  }
  while(not que.empty()) {
    auto p = que.front();
    que.pop();
    if(used[p]) {
      continue;
    }
    used[p] = true;
    for(auto to : g.g[p]) {
      if(used[to]) {
        continue;
      }
      --deg[to];
      ++ret;
      if(deg[to] <= 1) {
        que.emplace(to);
      }
    }
  }
  if(ret % 2) cout << "Yes\n";
  else cout << "No\n";
}
            
            
            
        