結果
| 問題 |
No.2172 SEARCH in the Text Editor
|
| コンテスト | |
| ユーザー |
Nachia
|
| 提出日時 | 2022-12-24 02:02:07 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 3,342 bytes |
| コンパイル時間 | 1,882 ms |
| コンパイル使用メモリ | 107,156 KB |
| 最終ジャッジ日時 | 2025-02-09 19:53:57 |
|
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 34 WA * 15 |
ソースコード
#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <atcoder/string>
#include <atcoder/modint>
using namespace std;
#define rep(i,n) for(int i=0; i<(int)(n); i++)
using Modint = atcoder::static_modint<998244353>;
const int SZ = 50;
const int SZZ = SZ * (SZ+1) / 2;
int Z(const string& preof, const string& sufof){
int x = min(preof.size(), sufof.size());
auto z = atcoder::z_algorithm(preof.substr(0, x) + sufof.substr(sufof.size() - x));
for(int i=x; i>=1; i--) if(z[z.size()-i] >= i) return i;
return 0;
}
string T;
int t;
int T6L[SZ+1]={}, T6R[SZ+1]={};
int T5[SZ+1][SZ+1]={};
string TPRE[SZ+1];
string TSUF[SZ+1];
vector<string> substrs;
int T4[SZZ][SZZ]={};
int T3L[SZZ]={}, T3R[SZZ]={};
int T2L[SZZ][SZ]={}, T2R[SZZ][SZ]={};
int T1[SZ][SZ]={};
void precalc(){
t = T.size();
rep(i,t+1) TPRE[i] = T.substr(0, i);
rep(i,t+1) TSUF[i] = T.substr(t-i);
rep(i,t+1) T6L[i] = i ? Z(TSUF[i].substr(0,i-1), T) : 0;
rep(i,t+1) T6R[i] = i ? Z(T, TPRE[i].substr(1)) : 0;
auto sa = atcoder::suffix_array(T);
auto lcp = atcoder::lcp_array(T, sa);
rep(i,t+1) rep(j,t+1) T5[i][j] = -1;
rep(i,t){
int k = i ? lcp[i-1] : 0;
for(int j=1; j<=t-sa[i] && j<t; j++){
if(j <= k){ T5[sa[i]][j] = T5[sa[i-1]][j]; continue; }
T5[sa[i]][j] = substrs.size();
substrs.push_back(T.substr(sa[i],j));
}
}
int nn = substrs.size();
rep(i,nn) rep(j,nn) T4[i][j] = -1;
rep(k,t+1) rep(j,k) rep(i,j) T4[T5[i][j-i]][T5[j][k-j]] = T5[i][k-i];
rep(j,nn) T3L[j] = Z(substrs[j], T);
rep(j,nn) T3R[j] = Z(T, substrs[j]);
rep(j,nn) rep(x,t) T2L[j][x] = Z(substrs[j] + TSUF[x], TSUF[t-1]);
rep(j,nn) rep(x,t) T2R[j][x] = Z(TPRE[t-1], TPRE[x] + substrs[j]);
for(int i=1; i<t; i++) T1[i][t-i] = 1;
for(int d=t+1; d<2*t; d++) for(int i=d-t+1; i<t; i++) T1[i][d-i] = T1[T6R[i]][d-i] + T1[i][T6L[d-i]] - T1[T6R[i]][T6L[d-i]];
}
struct Node{ int l; int r; Modint c; };
Node createNode(const string& s){
if(s.size() < T.size()){
auto x = lower_bound(substrs.begin(), substrs.end(), s);
if(x != substrs.end() && *x == s) return Node{ (int)(x-substrs.begin()), -1, Modint() };
return Node{ Z(s,TSUF[t-1]), Z(TPRE[t-1],s), Modint() };
}
int cnt = 0;
auto z = atcoder::z_algorithm(T + s);
rep(i,s.size()) if(z[t+i]>=t) cnt++;
return Node{ Z(s,TSUF[t-1]), Z(TPRE[t-1],s), Modint::raw(cnt) };
}
Node mergeNode(Node l, Node r){
if(l.r >= 0){
if(r.r >= 0) return { l.l, r.r, l.c + r.c + Modint::raw(T1[l.r][r.l]) };
return { l.l, T2R[r.l][l.r], l.c + Modint::raw(T1[l.r][T3L[r.l]]) };
}
if(r.r < 0){
int nx = T4[l.l][r.l];
if(nx >= 0) return { nx, -1, Modint() };
int lr = T3R[l.r], rl = T3L[r.l];
return { T2L[l.l][rl], T2R[r.l][lr], Modint::raw(T1[lr][rl]) };
}
return { T2L[l.l][r.l], r.r, r.c + Modint::raw(T1[T3R[l.l]][r.l]) };
}
int main() {
int N; cin >> N;
cin >> T;
precalc();
vector<Node> X(N);
rep(i,N){
string s; cin >> s;
if(s == "~"){
int j,k; cin >> j >> k;
X[i] = mergeNode(X[j-1], X[k-1]);
}
else{
X[i] = createNode(s);
}
}
cout << X[N-1].c.val() << '\n';
return 0;
}
Nachia