結果
| 問題 |
No.2531 Coloring Vertices on Namori
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2023-11-15 16:26:17 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 169 ms / 2,000 ms |
| コード長 | 3,960 bytes |
| コンパイル時間 | 4,710 ms |
| コンパイル使用メモリ | 258,524 KB |
| 最終ジャッジ日時 | 2025-02-17 22:06:39 |
|
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 * 3 |
| other | AC * 31 |
ソースコード
#include <bits/stdc++.h>
#include <atcoder/all>
#define SELECTER(_1,_2,_3,SELECT,...) SELECT
#define rep1(i,n) for(int i=0;i<(int)n;++i)
#define rep2(i,a,n) for(int i=(int)a;i<(int)n;++i)
#define rep(...) SELECTER(__VA_ARGS__,rep2,rep1)(__VA_ARGS__)
#define RSELECTER(_1, _2, _3, RSELECT, ...) RSELECT
#define rrep1(i,n) for(int i=(int)n-1;i>=0;--i)
#define rrep2(i,a,n) for(int i=(int)n-1;i>=(int)a;--i)
#define rrep(...) RSELECTER(__VA_ARGS__, rrep2, rrep1)(__VA_ARGS__)
#define all(a) a.begin(),a.end()
#define rall(a) a.rbegin(),a.rend()
#define fi first
#define se second
#define PrintR LogOutput
#ifdef _DEBUG
#define Log(...) LogOutput(__VA_ARGS__)
#else
#define Log(...)
#endif
using namespace std;
using namespace atcoder;
using ll=long long;
using ld=long double;
using pii=pair<int,int>;
using pll=pair<long long,long long>;
using pdd=pair<long double,long double>;
using tp=tuple<int,int,int>;
using tpll=tuple<ll,ll,ll>;
using veci=vector<int>;
using vecpii=vector<pair<int,int>>;
using vecll=vector<long long>;
using vecpll=vector<pair<long long,long long>>;
using vecpdd=vector<pair<long double,long double>>;
using vecs=vector<string>;
using vecb=vector<bool>;
using vecd=vector<long double>;
using vectp=vector<tp>;
using vectpll=vector<tpll>;
using mint=modint998244353;
using mint10=modint1000000007;
template<typename T, typename S>
istream& operator>>(istream& in, pair<T, S>& a){return in >> a.first >> a.second;}
template<typename T, typename S>
ostream& operator<<(ostream& out, const pair<T, S>& a){return out << a.first << ' ' << a.second;}
ostream& operator<<(ostream& out, const mint& a){return out << a.val();}
ostream& operator<<(ostream& out, const mint10& a){return out << a.val();}
ostream& operator<<(ostream& out, const modint& a){return out << a.val();}
template<typename T>
ostream& operator<<(ostream& out, const vector<T>& d){for(int i = 0 ; i < d.size() ; ++i) out << d[i] << (i == d.size() - 1 ? "" : " "); return out;}
template<typename T, typename S>
pair<T, S> operator+(const pair<T, S>& a, const pair<T, S>& b){return {a.fi + b.fi, a.se + b.se};}
template<typename T, typename S>
pair<T, S> operator-(const pair<T, S>& a, const pair<T, S>& b){return {a.fi - b.fi, a.se - b.se};}
template<class T> inline bool chmax(T& a,T b){if(a<b) {a=b;return true;} return false;}
template<class T> inline bool chmin(T& a,T b){if(a>b) {a=b;return true;} return false;}
bool Judge(int i, int j, int h, int w){return i < 0 || j < 0 || i >= h || j >= w;}
bool PrintA(int i){cout<<(i ? "Yes" : "No")<<endl;return i;}
constexpr ll INF=numeric_limits<ll>::max() / 4;
constexpr int inf=numeric_limits<int>::max() / 2;
constexpr ll MOD=998244353;
const int vi[] = {0, 1, 0, -1}, vj[] = {1, 0, -1, 0};
template<typename... Args>
void LogOutput(Args&&... args){
stringstream ss;
((ss << args << ' '), ...);
cout << ss.str().substr(0, ss.str().length() - 1) << endl;
}
template<typename T>
void LogOutput(vector<vector<T>>& data){for(auto d : data) LogOutput(d);}
int main(){
ios::sync_with_stdio(false);
std::cin.tie(nullptr);
int n, k;cin>>n>>k;
vector<veci> g(n);
veci deg(n, 0);
rep(i, n){
int a, b;cin>>a>>b;
a--, b--;
deg[a]++;
deg[b]++;
g[a].push_back(b);
g[b].push_back(a);
}
queue<int> q;
rep(i, n) if(deg[i] == 1) q.push(i);
veci cycle(n, 1);
while(q.size()){
int v = q.front(); q.pop();
cycle[v] = 0;
for(int nv : g[v]){
deg[nv]--;
if(deg[nv] == 1) q.push(nv);
}
}
veci used(n, 0);
int sz = 0;
mint ans = 1;
rep(i, n) if(cycle[i]){
sz++;
q.push(i);
while(q.size()){
int v = q.front(); q.pop();
for(int nv : g[v]) if(cycle[nv] == 0 && used[nv] == 0){
Log(nv);
q.push(nv);
ans *= k - 1;
used[nv] = 1;
}
}
}
vector dp(sz + 1, vector<mint>(2, 0));
dp[1][1] = k;
rep(i, 1, sz - 1){
dp[i + 1][0] = dp[i][0] * (k - 2) + dp[i][1] * (k - 1);
dp[i + 1][1] = dp[i][0];
}
ans *= dp[sz - 1][0] * (k - 2) + dp[sz - 1][1] * (k - 1);
cout<<ans<<endl;
}