結果

問題 No.263 Common Palindromes Extra
ユーザー fumiphysfumiphys
提出日時 2019-10-21 20:55:29
言語 C++14
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 153 ms / 2,000 ms
コード長 4,815 bytes
コンパイル時間 1,933 ms
コンパイル使用メモリ 181,228 KB
実行使用メモリ 134,888 KB
最終ジャッジ日時 2023-09-15 15:06:56
合計ジャッジ時間 3,890 ms
ジャッジサーバーID
（参考情報） 		judge11 / judge14
このコードへのチャレンジ
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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 7 ms
4,376 KB
testcase_01 AC 1 ms
4,376 KB
testcase_02 AC 2 ms
4,376 KB
testcase_03 AC 9 ms
4,792 KB
testcase_04 AC 39 ms
10,820 KB
testcase_05 AC 64 ms
10,260 KB
testcase_06 AC 5 ms
4,376 KB
testcase_07 AC 67 ms
41,504 KB
testcase_08 AC 85 ms
42,320 KB
testcase_09 AC 93 ms
72,900 KB
testcase_10 AC 153 ms
134,888 KB
testcase_11 AC 32 ms
9,876 KB
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ソースコード

diff # 

// includes
#include <bits/stdc++.h>
using namespace std;

// macros
#define pb emplace_back
#define mk make_pair
#define FOR(i, a, b) for(int i=(a);i<(b);++i)
#define rep(i, n) FOR(i, 0, n)
#define rrep(i, n) for(int i=((int)(n)-1);i>=0;i--)
#define irep(itr, st) for(auto itr = (st).begin(); itr != (st).end(); ++itr)
#define irrep(itr, st) for(auto itr = (st).rbegin(); itr != (st).rend(); ++itr)
#define all(x) (x).begin(),(x).end()
#define sz(x) ((int)(x).size())
#define UNIQUE(v) v.erase(unique(v.begin(), v.end()), v.end())
#define bit(n) (1LL<<(n))
// functions
template <class T>bool chmax(T &a, const T &b){if(a < b){a = b; return 1;} return 0;}
template <class T>bool chmin(T &a, const T &b){if(a > b){a = b; return 1;} return 0;}
template <typename T> istream &operator>>(istream &is, vector<T> &vec){for(auto &v: vec)is >> v; return is;}
template <typename T> ostream &operator<<(ostream &os, const vector<T>& vec){for(int i = 0; i < vec.size(); i++){ os << vec[i]; if(i + 1 != vec.size())os << " ";} return os;}
template <typename T> ostream &operator<<(ostream &os, const set<T>& st){for(auto itr = st.begin(); itr != st.end(); ++itr){ os << *itr; auto titr = itr; if(++titr != st.end())os << " ";} return os;}
template <typename T> ostream &operator<<(ostream &os, const unordered_set<T>& st){for(auto itr = st.begin(); itr != st.end(); ++itr){ os << *itr; auto titr = itr; if(++titr != st.end())os << " ";} return os;}
template <typename T> ostream &operator<<(ostream &os, const multiset<T>& st){for(auto itr = st.begin(); itr != st.end(); ++itr){ os << *itr; auto titr = itr; if(++titr != st.end())os << " ";} return os;}
template <typename T> ostream &operator<<(ostream &os, const unordered_multiset<T>& st){for(auto itr = st.begin(); itr != st.end(); ++itr){ os << *itr; auto titr = itr; if(++titr != st.end())os << " ";} return os;}
template <typename T1, typename T2> ostream &operator<<(ostream &os, const pair<T1, T2> &p){os << p.first << " " << p.second; return os;}
template <typename T1, typename T2> ostream &operator<<(ostream &os, const map<T1, T2> &mp){for(auto itr = mp.begin(); itr != mp.end(); ++itr){ os << itr->first << ":" << itr->second; auto titr = itr; if(++titr != mp.end())os << " "; } return os;}
template <typename T1, typename T2> ostream &operator<<(ostream &os, const unordered_map<T1, T2> &mp){for(auto itr = mp.begin(); itr != mp.end(); ++itr){ os << itr->first << ":" << itr->second; auto titr = itr; if(++titr != mp.end())os << " "; } return os;}
//  types
using ll = long long int;
using P = pair<int, int>;
// constants
const int inf = 1e9;
const ll linf = 1LL << 50;
const double EPS = 1e-10;
const int mod = 1000000007;
const int dx[4] = {-1, 0, 1, 0};
const int dy[4] = {0, -1, 0, 1};
// io
struct fast_io{
  fast_io(){ios_base::sync_with_stdio(false); cin.tie(0); cout << fixed << setprecision(20);}
} fast_io_;

struct Node{
  map<char, int> next;
  int len = 0;
  int suffixlink = -1;
  int cnt = 0;
  ll s = 0, t = 0;
  Node(int len, int suffixlink): len(len), suffixlink(suffixlink){}
};

int b = 0;

struct PalindromicTree{
  string s;
  vector<Node> tree;
  int curr = 0;
  vector<int> max_suffix_idx;
  PalindromicTree(){}
  PalindromicTree(const string &s): s(s){
    tree.reserve(s.size() + 2);
    curr = 2;
    tree.emplace_back(-1, 0);
    tree.emplace_back(0, 0);
    max_suffix_idx.resize(s.size() + 2, 1);
    for(size_t i = 0; i < s.size(); i++){
      addl(i);
      if(i < b)tree[max_suffix_idx[i + 2]].s++;
      else if(i >= b + 2)tree[max_suffix_idx[i + 2]].t++;
    }
  }
  // true if added, false if exists
  bool addl(int i){
    int A = max_suffix_idx[i+1];
    while(true){
      if(i - 1 - tree[A].len >= 0 && s[i - 1 - tree[A].len] == s[i])break;
      A = tree[A].suffixlink;
    }

    if(tree[A].next[s[i]] != 0){
      max_suffix_idx[i + 2] = tree[A].next[s[i]];
      return false;
    }

    max_suffix_idx[i + 2] = curr;
    tree[A].next[s[i]] = curr;
    curr++;
    tree.emplace_back(tree[A].len + 2, -1);

    if(tree.back().len == 1){
      tree.back().suffixlink = 1;
      tree.back().cnt = 1;
      return true;
    }

    int B = A;
    while(true){
      B = tree[B].suffixlink;
      if(i - 1 - tree[B].len >= 0 && s[i - 1 - tree[B].len] == s[i])break;
    }
    tree.back().suffixlink = tree[B].next[s[i]];
    tree.back().cnt = 1 + tree[tree.back().suffixlink].cnt;
    return true;
  }
};

PalindromicTree pt;

int main(int argc, char const* argv[])
{
  string s, t; cin >> s >> t;
  b = s.size();
  string u = s + "<>" + t;
  pt = PalindromicTree(u);
  ll res = 0;
  for(int i = sz(pt.tree) - 1; i > 1; i--){
    res += (ll)pt.tree[i].s * (ll)pt.tree[i].t;
    pt.tree[pt.tree[i].suffixlink].s += pt.tree[i].s;
    pt.tree[pt.tree[i].suffixlink].t += pt.tree[i].t;
  }
  cout << res << endl;
  return 0;
}
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