結果
問題 |
No.263 Common Palindromes Extra
|
ユーザー |
![]() |
提出日時 | 2016-12-04 00:54:41 |
言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 5,339 bytes |
コンパイル時間 | 1,639 ms |
コンパイル使用メモリ | 120,604 KB |
実行使用メモリ | 223,380 KB |
最終ジャッジ日時 | 2024-11-27 17:19:00 |
合計ジャッジ時間 | 3,194 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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ファイルパターン | 結果 |
---|---|
other | AC * 9 WA * 2 MLE * 1 |
ソースコード
#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; class palindromic_tree{ public: struct node{ map<char, int> e; int suf; int len; long long cnt_s = 0; long long cnt_t = 0; }; const string& s; vector<node> t; void constract(){ int pos = 1; for(int i=0; i<s.size(); i++){ 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]]; if(i<s.size()/2){ t[pos].cnt_s++; }else{ t[pos].cnt_t++; } continue; } int nx = t.size(); t.push_back(node{{}, -1, t[pos].len+2, 0, 0}); t[pos].e[s[i]] = nx; if(i<s.size()/2){ t[nx].cnt_s++; }else{ t[nx].cnt_t++; } 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){ init(); constract(); } }; int main(){ string s,t; cin >> s,t; s += "{}"s + t; t = ""; palindromic_tree p(s); vector<vector<int>> rt(p.t.size()); for(int i=0; i<p.t.size(); i++){ rt[ p.t[i].suf ].push_back(i); } long long ans = 0; function<pair<long long,long long>(int)> dfs = [&](int pos) -> pair<long long,long long>{ pair<long long,long long> res = {0,0}; for(auto nx : rt[pos]){ if(nx == pos) continue; auto tmp = dfs(nx); res.first += tmp.first; res.second += tmp.second; } pair<long long,long long> ret = {res.first + p.t[pos].cnt_s, res.second + p.t[pos].cnt_t}; if(p.t[pos].len > 0){ ans += ret.first * ret.second; } return ret; }; dfs(0); println(ans); return 0; }