結果

問題 No.465 PPPPPPPPPPPPPPPPAPPPPPPPP
ユーザー koyumeishi
提出日時 2016-12-16 06:09:43
言語 C++14
(gcc 6.3.0)
結果
WA  
実行時間 -
コード長 8487 Byte
コンパイル時間 2000 ms
使用メモリ 422140 KB

テストケース

テストケース表示
入力 結果 実行時間
使用メモリ
00_sample_1.txt AC 5 ms
1692 KB
00_sample_2.txt AC 4 ms
1704 KB
00_sample_3.txt AC 4 ms
1696 KB
10_alomomola.txt AC 4 ms
1680 KB
10_iwi.txt AC 5 ms
1680 KB
20_amararama.txt AC 110 ms
3680 KB
20_evitative.txt AC 583 ms
11984 KB
21_girafarig.txt AC 110 ms
3944 KB
21_nisioisin.txt AC 507 ms
11744 KB
22_redivider.txt AC 777 ms
179304 KB
22_rotavator.txt AC 769 ms
202612 KB
30_aibohphobia.txt AC 894 ms
90396 KB
30_ifihadahifi.txt AC 628 ms
65724 KB
30_kinnikinnik.txt AC 544 ms
47948 KB
30_seveneves.txt AC 684 ms
48168 KB
31_neveroddoreven.txt AC 1028 ms
353944 KB
31_onlineenilno.txt AC 956 ms
373400 KB
31_wassamassaw.txt AC 924 ms
375000 KB
32_dorkrockcorkrod.txt WA -
32_ratsliveonnoevilstar.txt AC 975 ms
383000 KB
32_satanoscillatemymetallicsonatas.txt AC 999 ms
422140 KB
33_atoyotaracefastsafecaratoyota.txt AC 537 ms
12316 KB
33_godsawiwasdog.txt WA -
テストケース一括ダウンロード

ソースコード

diff #
#pragma GCC optimize ("O3")
#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 <bitset>
// using bits = bitset<500001>;

struct unko_bit{
  constexpr static int bit_size = 1024;
  using integer = bitset<bit_size>;
  constexpr static int len = (500001+bit_size-1)/bit_size;
  integer value[len];
  int cnt[len];

  unko_bit(){
    for(int i=0; i<len; i++){
      cnt[i] = 0;
    }
  }
  void set(int k, int x){
    if(x){
      value[k/bit_size].set(k%bit_size, 1);// |= integer(1) << (k%bit_size);
    }else{
      value[k/bit_size].set(k%bit_size, 0);// &= ~(integer(1) << (k%bit_size));
    }
    cnt[k/bit_size] = value[k/bit_size].count();
  }

  int count(unko_bit& x, int shift){
    int ss = shift/bit_size;
    int dd = shift%bit_size;
    int ret = 0;
    for(int i=ss; i<len; ++i){
      if(cnt[i] == 0) continue;
      if(i-ss >= 0 && x.cnt[i-ss] > 0) ret += (value[i] & (x.value[i-ss] << dd)).count();
      if(dd != 0 && i-ss-1 >= 0 && x.cnt[i-ss-1] > 0) ret += (value[i] & (x.value[i-ss-1] >> (bit_size-dd))).count();
    }
    return ret;
  }
};
using bits = unko_bit;


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

    int depth;
  };

  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, 1});
      t[pos].e[s[i]] = nx;

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

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

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

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

long long dfs(palindromic_tree& p, int i, vector<bits*>& aho, int n, bits& head, vector<long long>& sum){
  int pos = p.s_pos[i];

  if( p.t[pos].len == i+1 && p.t[p.t[pos].suf].len == p.t[pos].len-1){
    return sum[i-1];
  }
  if( p.t[pos].len == i && p.t[p.t[pos].suf].len == p.t[pos].len-2 && p.t[ p.s_pos[i-1] ].len == i){
    return sum[i-1];
  }
  if( p.t[pos].len == i+1 && p.t[p.t[pos].suf].len == p.t[pos].len-2){
    return 0;
  }

  long long ret = 0;
  while(pos > 1){
    if(aho[pos] != nullptr){
      //ret += (head&((*aho[pos])<<(n-1-i))).count();
      ret += head.count(*aho[pos], n-1-i);
      //assert(false);
      break;
    }

    int len = p.t[ pos ].len;
    int suf = p.t[ pos ].suf;


    int left = i-len;
    if(left >= 0){
      if(left - p.t[ p.s_pos[left] ].len == -1) ret++;
    }

    if( i-len >= 0 && sum[ i-len ] == sum[ i-1 ] ){
      break;
    }

    pos = suf;
  }
  return ret;
}

const int block = 255;

void dfs2(palindromic_tree& p, vector<vector<int>>& G, int pos, bits& s, vector<bits*>& aho, int d){
  if(pos>1) s.set( p.t[pos].len, 1 );
  //if(pos>1) if( d % block == 0){
  if(pos>1) if( (d & 127) == 0){
  //if(pos>1) if( d>100 && (rand() & 255) == 0){
    aho[pos] = new bits(s);
  }
  for(int nx : G[pos]){
    if(nx == pos)continue;
    dfs2(p,G, nx, s, aho, d+1);
  }
  if(pos>1) s.set( p.t[pos].len , 0 );
}


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

  auto start = chrono::steady_clock::now();

  // set<char> unko(s.begin(), s.end());
  // if(unko.size() == 1){
  //   long long n = s.size() - 3;
  //   println( n*(n+1)*(n+2)/6 );
  //   return 0;
  // }

  palindromic_tree p(s);

  vector<long long> sum(s.size(), 0);
  bits head;
  for(int i=0; i<s.size(); i++){
    if( p.t[p.s_pos[i]].len == i+1 ){
      head.set(s.size()-1-i,1);
      sum[i] += 1;
    }
    if(i) sum[i] += sum[i-1];
  }
  vector<vector<int>> G(p.t.size());
  for(int i=0; i<p.t.size(); ++i){
    G[ p.t[i].suf ].push_back( i );
  }
  vector<bits*> aho(p.t.size(), nullptr);
  bits tmp;
  dfs2(p,G,0,tmp, aho, 0);

  eprintln("pre calc node", aho.size() - count(aho.begin(), aho.end(), nullptr));

  vector<long long> dp(s.size()+1, 0);
  for(int i=1; i<s.size()-2; ++i){
    dp[i] = dfs(p, i, aho, s.size(), head, sum);

    if(chrono::duration_cast<chrono::milliseconds>(chrono::steady_clock::now()-start).count() > 1850) break;
  }

  // eprintln("dp result");
  // 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);

  auto end = chrono::steady_clock::now();
  eprintln("computed in ", chrono::duration_cast<chrono::milliseconds>(end-start).count() , "[ms]");


  return 0;
}
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