結果

問題 No.2360 Path to Integer
ユーザー momohara
提出日時 2024-08-11 20:27:48
言語 C++23
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 181 ms / 2,500 ms
コード長 4,969 bytes
コンパイル時間 5,547 ms
コンパイル使用メモリ 324,548 KB
実行使用メモリ 57,600 KB
最終ジャッジ日時 2024-08-11 20:27:56
合計ジャッジ時間 8,203 ms
ジャッジサーバーID
(参考情報)
judge5 / judge4
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 2
other AC * 15
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

#include <atcoder/all>
#include <bits/stdc++.h>
using namespace std;
using namespace atcoder;
#ifdef DEBUG
#include "debug/all.hpp"
#else
#define debug(...) 42
#endif
using ll = long long;
using ull = unsigned long long;
using ld = long double;
using P = pair<ll, ll>;
using tp = tuple<ll, ll, ll>;
template <class T>
using vec = vector<T>;
template <class T>
using vvec = vector<vec<T>>;
#define all(hoge) (hoge).begin(), (hoge).end()
#define en '\n'
#define rep(i, m, n) for(ll i = (ll)(m); i < (ll)(n); ++i)
#define rep2(i, m, n) for(ll i = (ll)(n)-1; i >= (ll)(m); --i)
#define REP(i, n) rep(i, 0, n)
#define REP2(i, n) rep2(i, 0, n)
constexpr long long INF = 1LL << 60;
constexpr int INF_INT = 1 << 30;
// constexpr long long MOD = (ll)1e9 + 7;
constexpr long long MOD = 998244353LL;
static const ld pi = 3.141592653589793L;
template <class T>
inline bool chmin(T &a, T b) {
if(a > b) {
a = b;
return true;
}
return false;
}
template <class T>
inline bool chmax(T &a, T b) {
if(a < b) {
a = b;
return true;
}
return false;
}
struct Edge {
int to, rev;
ll cap;
Edge(int _to, int _rev, ll _cap) : to(_to), rev(_rev), cap(_cap) {}
};
typedef vector<Edge> Edges;
typedef vector<Edges> Graph;
void add_edge(Graph &G, int from, int to, ll cap, bool revFlag, ll revCap) {
G[from].push_back(Edge(to, (int)G[to].size(), cap));
if(revFlag)
G[to].push_back(Edge(from, (int)G[from].size() - 1, revCap));
}
template <typename E, typename F, typename PE, typename PV>
class RerootingDP {
private:
int n;
E id;
F merge;
PE put_edge;
PV put_vertex;
Graph g;
vector<E> subdp;
vector<E> dp;
public:
vector<E> ans;
RerootingDP(Graph _g, E _id, F f, PE pe, PV pv, int root = 0) : n(_g.size()), g(_g), id(_id), merge(f), put_edge(pe), put_vertex(pv), subdp(n,
        _id), dp(n, _id), ans(n, _id) {
build(root);
reroot(root);
}
void build(int root) {
auto dfs = [&](auto &&self, int v, int p) -> void {
E val = id;
for(auto e : g[v]) {
if(e.to == p)
continue;
self(self, e.to, v);
E nval = put_edge(subdp[e.to], e);
val = merge(val, nval);
}
subdp[v] = put_vertex(val, v);
};
dfs(dfs, root, -1);
}
void reroot(int root) {
auto dfs = [&](auto &&self, int v, int p, E pval) -> void {
vec<E> as;
for(auto e : g[v]) {
if(e.to == p) {
as.push_back(put_edge(pval, e));
} else {
as.push_back(put_edge(subdp[e.to], e));
}
}
vec<E> al(as.size(), as[0]);
REP(i, as.size() - 1) {
al[i + 1] = merge(as[i + 1], al[i]);
}
vec<E> ar(as.size(), as.back());
REP2(i, as.size() - 1) {
ar[i] = merge(as[i], ar[i + 1]);
}
dp[v] = merge(dp[v], put_vertex(al.back(), v));
ans[v] = dp[v];
int k = 0;
for(auto e : g[v]) {
if(e.to == p) {
k++;
continue;
}
E val = id;
if(k - 1 >= 0)
val = merge(val, al[k - 1]);
if(k + 1 < ar.size())
val = merge(val, ar[k + 1]);
val = put_vertex(val, v);
self(self, e.to, v, val);
k++;
}
};
dfs(dfs, root, -1, id);
}
};
void solve() {
ll n;
cin >> n;
vec<string> a(n);
REP(i, n) { cin >> a[i]; }
Graph g(n);
REP(i, n - 1) {
int u, v;
cin >> u >> v;
u--;
v--;
add_edge(g, u, v, 1, true, 1);
}
using mint = modint998244353;
struct S {
mint sum;
mint con;
S(mint _sum, mint _con) : sum(_sum), con(_con) {}
S() : sum(0), con(0) {}
};
S id = S();
auto merge = [](S a, S b) -> S { return S(a.sum + b.sum, a.con + b.con); };
auto put_edge = [](S val, Edge e) { return val; };
auto put_vertex = [&](S val, int v) {
// cout << v << ":" << val.sum.val() << " " << val.con.val() << en;
mint con = val.con + 1;
mint sum = val.sum * mint(10).pow(a[v].size()) + con * stoll(a[v]);
// cout << sum.val() << " " << con.val() << en;
return S(sum, con);
};
RerootingDP rdp(g, id, merge, put_edge, put_vertex);
auto dp = rdp.ans;
mint ans = 0;
for(auto i : dp) {
ans += i.sum;
}
cout << ans.val() << en;
}
int main() {
ios::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
// cout << fixed << setprecision(10);
// ll t;
// cin >> t;
// REP(i, t - 1) {
// solve();
// }
solve();
return 0;
}
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