結果
問題 | No.2674 k-Walk on Bipartite |
ユーザー | MMRZ |
提出日時 | 2024-03-28 23:41:19 |
言語 | C++23 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 84 ms / 2,000 ms |
コード長 | 3,958 bytes |
コンパイル時間 | 3,061 ms |
コンパイル使用メモリ | 262,396 KB |
実行使用メモリ | 14,276 KB |
最終ジャッジ日時 | 2024-09-30 14:53:43 |
合計ジャッジ時間 | 5,133 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge1 |
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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
6,820 KB |
testcase_01 | AC | 2 ms
6,820 KB |
testcase_02 | AC | 2 ms
6,816 KB |
testcase_03 | AC | 2 ms
6,820 KB |
testcase_04 | AC | 2 ms
6,820 KB |
testcase_05 | AC | 2 ms
6,816 KB |
testcase_06 | AC | 1 ms
6,816 KB |
testcase_07 | AC | 47 ms
13,160 KB |
testcase_08 | AC | 55 ms
11,008 KB |
testcase_09 | AC | 41 ms
12,664 KB |
testcase_10 | AC | 69 ms
12,544 KB |
testcase_11 | AC | 40 ms
10,480 KB |
testcase_12 | AC | 68 ms
11,136 KB |
testcase_13 | AC | 36 ms
11,264 KB |
testcase_14 | AC | 11 ms
9,216 KB |
testcase_15 | AC | 77 ms
13,568 KB |
testcase_16 | AC | 54 ms
13,864 KB |
testcase_17 | AC | 52 ms
10,624 KB |
testcase_18 | AC | 22 ms
8,904 KB |
testcase_19 | AC | 44 ms
11,928 KB |
testcase_20 | AC | 39 ms
12,992 KB |
testcase_21 | AC | 55 ms
11,584 KB |
testcase_22 | AC | 84 ms
14,276 KB |
testcase_23 | AC | 2 ms
6,816 KB |
testcase_24 | AC | 2 ms
6,816 KB |
testcase_25 | AC | 2 ms
6,820 KB |
testcase_26 | AC | 2 ms
6,820 KB |
testcase_27 | AC | 2 ms
6,816 KB |
testcase_28 | AC | 2 ms
6,820 KB |
testcase_29 | AC | 1 ms
6,820 KB |
testcase_30 | AC | 2 ms
6,820 KB |
testcase_31 | AC | 1 ms
6,816 KB |
testcase_32 | AC | 2 ms
6,816 KB |
testcase_33 | AC | 2 ms
6,820 KB |
testcase_34 | AC | 1 ms
6,816 KB |
testcase_35 | AC | 2 ms
6,816 KB |
testcase_36 | AC | 2 ms
6,820 KB |
testcase_37 | AC | 2 ms
6,816 KB |
testcase_38 | AC | 2 ms
6,816 KB |
ソースコード
# include <bits/stdc++.h> using namespace std; using ll = long long; using ull = unsigned long long; const double pi = acos(-1); template<class T>constexpr T inf() { return ::std::numeric_limits<T>::max(); } template<class T>constexpr T hinf() { return inf<T>() / 2; } template <typename T_char>T_char TL(T_char cX) { return tolower(cX); } template <typename T_char>T_char TU(T_char cX) { return toupper(cX); } template<class T> bool chmin(T& a,T b) { if(a > b){a = b; return true;} return false; } template<class T> bool chmax(T& a,T b) { if(a < b){a = b; return true;} return false; } template<class T> bool is_sqare(T a) { if(floor(sqrt(a)) * floor(sqrt(a)) == a){ return true; }return false; } int popcnt(unsigned long long n) { int cnt = 0; for (int i = 0; i < 64; i++)if ((n >> i) & 1)cnt++; return cnt; } int d_sum(ll n) { int ret = 0; while (n > 0) { ret += n % 10; n /= 10; }return ret; } int d_cnt(ll n) { int ret = 0; while (n > 0) { ret++; n /= 10; }return ret; } ll gcd(ll a, ll b) { if (b == 0)return a; return gcd(b, a%b); }; ll lcm(ll a, ll b) { ll g = gcd(a, b); return a / g*b; }; template<class T> using dijk = priority_queue<T, vector<T>, greater<T>>; # define all(qpqpq) (qpqpq).begin(),(qpqpq).end() # define UNIQUE(wpwpw) (wpwpw).erase(unique(all((wpwpw))),(wpwpw).end()) # define LOWER(epepe) transform(all((epepe)),(epepe).begin(),TL<char>) # define UPPER(rprpr) transform(all((rprpr)),(rprpr).begin(),TU<char>) # define rep(i,upupu) for(ll i = 0, i##_len = (upupu);(i) < (i##_len);(i)++) # define reps(i,opopo) for(ll i = 1, i##_len = (opopo);(i) <= (i##_len);(i)++) # define len(x) ((ll)(x).size()) # define bit(n) (1LL << (n)) # define pb push_back # define exists(c, e) ((c).find(e) != (c).end()) #ifdef LOCAL # include "_debug_print.hpp" # define debug(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__) #else # define debug(...) (static_cast<void>(0)) #endif struct INIT{ INIT(){ std::ios::sync_with_stdio(false); std::cin.tie(0); cout << fixed << setprecision(20); } }INIT; struct union_find { vector<int> par, rnk; union_find(size_t size){ par.resize(size); rnk.resize(size, 0); for(int i = 0;i < (int)size;i++){ par[i] = i; } } int root(int x){ if(par[x] == x)return x; else return par[x] = root(par[x]); } bool is_root(int x){ return root(x) == x; } void unite(int x, int y){ x = root(x); y = root(y); if(x == y)return; if(rnk[x] < rnk[y]){ par[x] = y; }else{ par[y] = x; if(rnk[x] == rnk[y])rnk[x]++; } } bool same(int x,int y){ return root(x) == root(y); } }; void solve(){ int n, m; cin >> n >> m; int s, t, k; cin >> s >> t >> k; s--, t--; union_find uf(n); vector<vector<int>> g(n); rep(i, m){ int a, b; cin >> a >> b; a--, b--; uf.unite(a, b); g[a].pb(b); g[b].pb(a); } if(n == 1){ cout << (k == 0 ? "Yes" : "No") << endl; return; } if(n == 2){ if(s == t){ if(uf.same(0, 1)){ cout << (k%2 == 0 ? "Yes" : "No") << endl; return; }else{ cout << (k%2 == 0 ? "Unknown" : "No") << endl; } return; }else{ if(uf.same(0, 1)){ cout << (k%2 ? "Yes" : "No") << endl; return; }else{ cout << (k%2 ? "Unknown" : "No") << endl; } return; } } if(not uf.same(s, t)){ cout << "Unknown" << endl; return; } vector<int> dis(n, hinf<int>()); dis[s] = 0; queue<int> q; q.push(s); while(not q.empty()){ auto cur = q.front(); q.pop(); for(auto to : g[cur]){ if(dis[to] != hinf<int>())continue; dis[to] = dis[cur] + 1; q.push(to); } } if(dis[t]%2 != k%2){ cout << "No" << endl; return; } cout << (dis[t] <= k ? "Yes" : "Unknown") << endl; } int main(){ int t = 1; //cin >> t; while(t--)solve(); }