結果
| 問題 |
No.2780 The Bottle Imp
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2024-06-07 23:58:03 |
| 言語 | C++23 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 106 ms / 2,000 ms |
| コード長 | 4,193 bytes |
| コンパイル時間 | 4,739 ms |
| コンパイル使用メモリ | 263,224 KB |
| 実行使用メモリ | 32,376 KB |
| 最終ジャッジ日時 | 2024-12-27 14:45:19 |
| 合計ジャッジ時間 | 8,411 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 40 |
ソースコード
#line 1 "cp_templates/template/template.hpp"
# 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; }
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; };
ll MOD(ll x, ll m){return (x%m+m)%m; }
ll FLOOR(ll x, ll m) {ll r = (x%m+m)%m; return (x-r)/m; }
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())
struct INIT{
INIT(){
std::ios::sync_with_stdio(false);
std::cin.tie(0);
cout << fixed << setprecision(20);
}
}INIT;
namespace mmrz {
void solve();
}
int main(){
mmrz::solve();
}
#line 1 "cp_templates/data_structure/union_find.hpp"
struct union_find {
vector<int> v;
union_find(size_t size) : v(size, -1) {}
int root(int x){
return (v[x] < 0 ? x : v[x] = root(v[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){
if(v[x] > v[y])swap(x, y);
v[x] += v[y];
v[y] = x;
}
}
bool is_same(int x,int y){
return root(x) == root(y);
}
int get_size(int x){
x = root(x);
return -v[x];
}
};
#line 3 "2780.cpp"
using namespace mmrz;
struct scc_graph {
vector<vector<int>> g;
vector<vector<int>> rg;
vector<bool> used;
vector<int> cmp;
vector<int> vs;
int n;
int k;
scc_graph(int _n) : n(_n), k(0) {
g.resize(n);
rg.resize(n);
used.resize(n);
cmp.resize(n);
}
void add_edge(int a, int b) {
g[a].push_back(b);
rg[b].push_back(a);
}
void dfs(int v){
used[v] = true;
for(auto to : g[v]){
if(not used[to])dfs(to);
}
vs.pb(v);
}
void rdfs(int v, int col){
used[v] = true;
cmp[v] = col;
for(auto to : rg[v]){
if(not used[to])rdfs(to, col);
}
}
vector<vector<int>> scc() {
for(int i = 0;i < n;i++){
if(not used[i])dfs(i);
}
for(int i = 0;i < n;i++){
used[i] = false;
}
for(auto i = vs.rbegin();i != vs.rend();i++){
if(not used[*i])rdfs(*i, k++);
}
vector<vector<int>> ret(k);
for(int i = 0;i < n;i++){
ret[cmp[i]].push_back(i);
}
return ret;
}
};
void SOLVE(){
int n;
cin >> n;
scc_graph g(n);
vector<vector<int>> gr(n);
rep(i, n){
int a;
cin >> a;
rep(j, a){
int b;
cin >> b;
b--;
gr[i].pb(b);
g.add_edge(i, b);
}
}
auto scc = g.scc();
vector<int> topol(n);
rep(i, len(scc)){
for(auto y : scc[i]){
topol[y] = i;
}
}
bool flg = false;
for(auto i : scc[0]){
if(i == 0)flg = true;
}
if(!flg){
cout << "No" << endl;
return;
}
rep(i, len(scc)-1){
bool c = false;
for(auto j : scc[i]){
for(auto k : gr[j]){
if(topol[k] == i+1)c = true;
}
}
if(not c){
cout << "No" << endl;
return;
}
}
cout << "Yes" << endl;
}
void mmrz::solve(){
int t = 1;
//cin >> t;
while(t--)SOLVE();
}