結果

問題 No.465 PPPPPPPPPPPPPPPPAPPPPPPPP
ユーザー koyumeishikoyumeishi
提出日時 2016-12-17 06:42:29
言語 C++14
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 259 ms / 2,000 ms
コード長 6,346 bytes
コンパイル時間 1,541 ms
コンパイル使用メモリ 126,376 KB
実行使用メモリ 64,436 KB
最終ジャッジ日時 2024-05-08 04:01:47
合計ジャッジ時間 5,112 ms
ジャッジサーバーID
（参考情報） 		judge2 / judge4
このコードへのチャレンジ
（要ログイン）

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 2 ms
6,812 KB
testcase_01 AC 2 ms
6,940 KB
testcase_02 AC 2 ms
6,944 KB
testcase_03 AC 2 ms
6,940 KB
testcase_04 AC 2 ms
6,940 KB
testcase_05 AC 21 ms
6,944 KB
testcase_06 AC 99 ms
13,692 KB
testcase_07 AC 23 ms
6,944 KB
testcase_08 AC 98 ms
13,360 KB
testcase_09 AC 138 ms
38,804 KB
testcase_10 AC 145 ms
46,744 KB
testcase_11 AC 259 ms
62,344 KB
testcase_12 AC 199 ms
46,092 KB
testcase_13 AC 139 ms
45,664 KB
testcase_14 AC 186 ms
37,864 KB
testcase_15 AC 162 ms
60,752 KB
testcase_16 AC 155 ms
58,500 KB
testcase_17 AC 156 ms
58,772 KB
testcase_18 AC 175 ms
64,360 KB
testcase_19 AC 165 ms
64,352 KB
testcase_20 AC 92 ms
13,684 KB
testcase_21 AC 180 ms
64,436 KB
32_ratsliveonnoevilstar.txt AC 168 ms
64,360 KB
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 # 

#include <iostream>
#include <vector>
#include <cstdio>
#include <sstream>
#include <map>
#include <string>
#include <algorithm>
#include <queue>
#include <cmath>
#include <functional>
#include <set>
#include <ctime>
#include <random>
#include <chrono>
#include <cassert>
#include <tuple>
#include <utility>
using namespace std;

namespace {
  using Integer = long long; //__int128;
  template<class T, class S> istream& operator >> (istream& is, pair<T,S>& p){return is >> p.first >> p.second;}
  template<class T> istream& operator >> (istream& is, vector<T>& vec){for(T& val: vec) is >> val; return is;}
  template<class T> istream& operator ,  (istream& is, T& val){ return is >> val;}
  template<class T, class S> ostream& operator << (ostream& os, const pair<T,S>& p){return os << p.first << " " << p.second;}
  template<class T> ostream& operator << (ostream& os, const vector<T>& vec){for(size_t i=0; i<vec.size(); i++) os << vec[i] << (i==vec.size()-1?"":" "); return os;}
  template<class T> ostream& operator ,  (ostream& os, const T& val){ return os << " " << val;}

  template<class H> void print(const H& head){ cout << head; }
  template<class H, class ... T> void print(const H& head, const T& ... tail){ cout << head << " "; print(tail...); }
  template<class ... T> void println(const T& ... values){ print(values...); cout << endl; }

  template<class H> void eprint(const H& head){ cerr << head; }
  template<class H, class ... T> void eprint(const H& head, const T& ... tail){ cerr << head << " "; eprint(tail...); }
  template<class ... T> void eprintln(const T& ... values){ eprint(values...); cerr << endl; }

  class range{ Integer start_, end_, step_; public: struct range_iterator{ Integer val, step_; range_iterator(Integer v, Integer step) : val(v), step_(step) {} Integer operator * (){return val;} void operator ++ (){val += step_;} bool operator != (range_iterator& x){return step_ > 0 ? val < x.val : val > x.val;} }; range(Integer len) : start_(0), end_(len), step_(1) {} range(Integer start, Integer end) : start_(start), end_(end), step_(1) {} range(Integer start, Integer end, Integer step) : start_(start), end_(end), step_(step) {} range_iterator begin(){ return range_iterator(start_, step_); } range_iterator   end(){ return range_iterator(  end_, step_); } };

  inline string operator "" _s (const char* str, size_t size){ return move(string(str)); }
  constexpr Integer my_pow(Integer x, Integer k, Integer z=1){return k==0 ? z : k==1 ? z*x : (k&1) ? my_pow(x*x,k>>1,z*x) : my_pow(x*x,k>>1,z);}
  constexpr Integer my_pow_mod(Integer x, Integer k, Integer M, Integer z=1){return k==0 ? z%M : k==1 ? z*x%M : (k&1) ? my_pow_mod(x*x%M,k>>1,M,z*x%M) : my_pow_mod(x*x%M,k>>1,M,z);}
  constexpr unsigned long long operator "" _ten (unsigned long long value){ return my_pow(10,value); }

  inline int k_bit(Integer x, int k){return (x>>k)&1;} //0-indexed

  mt19937 mt(chrono::duration_cast<chrono::nanoseconds>(chrono::steady_clock::now().time_since_epoch()).count());

  template<class T> string join(const vector<T>& v, const string& sep){ stringstream ss; for(size_t i=0; i<v.size(); i++){ if(i>0) ss << sep; ss << v[i]; } return ss.str(); }

  inline string operator * (string s, int k){ string ret; while(k){ if(k&1) ret += s; s += s; k >>= 1; } return ret; }
}
constexpr long long mod = 9_ten + 7;

#include <tuple>

class palindromic_tree{
 public:
  struct node{
    map<char, int> e;
    int suf;
    int len;

  };

  const string& s;
  vector<node> t;
  vector<int> s_pos;

  void constract(){
    int pos = 1;
    for(int i=0; i<s.size(); s_pos[i++] = pos){
      while(1){
        if( i-t[pos].len-1 >= 0 && s[i-t[pos].len-1] == s[i]) break;
        pos = t[pos].suf;
      }
      if(t[pos].e.count(s[i])){
        pos = t[pos].e[s[i]];
        continue;
      }

      int nx = t.size();
      t.push_back(node{{}, -1, t[pos].len+2});
      t[pos].e[s[i]] = nx;

      if(t[nx].len == 1){
        t[nx].suf = 1;
        pos = nx;
        continue;
      }

      while(1){
        pos = t[pos].suf;
        if( i-t[pos].len-1 >= 0 && s[i-t[pos].len-1] == s[i]){
          t[nx].suf = t[pos].e[s[i]];
          break;
        }
      }
      pos = nx;
    }
  }

  void init(){
    t[0].suf = 0;
    t[0].len = -1;

    t[1].suf = 0;
    t[1].len = 0;
  }

  palindromic_tree(const string& s_) : s(s_), t(2), s_pos(s_.size()){
    init();
    constract();
  }
};

int main(){
  string s;
  cin >> s;

  palindromic_tree p(s);

  vector<long long> dp(s.size()+1, 0);
  vector<long long> dp_(s.size()+1, 0);

  using tt = tuple<int,int,int>;
  deque<tt> g;
  for(int j=0; j<s.size(); ++j){
    deque<tt> g_;
    for(auto& t : g){
      int i = get<0>(t), d = get<1>(t), k = get<2>(t);
      if(i && s[i-1] == s[j]){
        g_.push_back( tt{i-1, d, k} );
      }
    }

    deque<tt> g__;
    int r = -j-1;
    for(auto& t : g_){
      int i = get<0>(t), d = get<1>(t), k = get<2>(t);
      if(i-r != d){
        g__.push_back( tt{i,i-r,1} );
        if( k>1 ){
          g__.push_back( tt{i+d, d, k-1} );
        }
      }else{
        g__.push_back( tt{i,d,k} );
      }
      r = i+(k-1)*d;
    }
    if( j && s[j-1] == s[j] ){
      g__.push_back( tt{j-1, j-1-r, 1} );
      r = j-1;
    }
    g__.push_back( tt{j,j-r,1} );
    g.clear();

    tt x = g__.front(); g__.pop_front();

    while(g__.size()){
      int& d_ = get<1>(x); int& k_ = get<2>(x);
      auto t = g__.front(); g__.pop_front();
      int i = get<0>(t), d = get<1>(t), k = get<2>(t);
      if( d_ == d ) k_ += k;
      else{
        g.push_back( x );
        x = t;
      }
    }

    g.push_back( x );

    for(auto& t : g){
      int i = get<0>(t), d = get<1>(t), k = get<2>(t);
      r = i+(k-1)*d;
      long long unko = 0;
      if(r-1>=0){
        unko += p.t[p.s_pos[r-1]].len == r;
      }

      if( k>1 && i-d>=0){
        unko += dp_[i-d];
      }
      dp[j] += unko;
      if( i-d>=0 ){
        dp_[i-d] = unko;
      }
    }
  }

  // eprintln(dp);
  // eprintln(dp_);

  for(int i=1; i<s.size(); ++i){
    dp[i] += dp[i-1];
  }

  long long ans = 0;
  int pos = p.s_pos[ s.size()-1 ];
  int i = s.size()-1;
  while(pos > 1){
    int len = p.t[pos].len;
    int suf = p.t[pos].suf;
    int left = i-len-1;

    if( left >= 0 ){
      ans += dp[left];
    }

    pos = suf;
  }

  println(ans);

  return 0;
}
0