제출 #785930

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
785930		MilosMilutinovic	Kralj (COCI16_kralj)	C++14	0 / 140	283 ms	23392 KiB

kralj

/**
 *    author:  wxhtzdy
 *    created: 17.07.2023 21:12:57
**/
#include <bits/stdc++.h>

using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);  
  int n;
  cin >> n;
  vector<string> s(n);
  for (int i = 0; i < n; i++) {
    cin >> s[i];
    reverse(s[i].begin(), s[i].end());
  }
  sort(s.begin(), s.end(), [&](string s, string t) {
    if (s.size() != t.size()) {
      return s.size() < t.size();
    } else {
      return s < t;
    }
  });          
  const int A = 26;
  vector<vector<int>> trie(1, vector<int>(A, -1));
  vector<int> f0(n), f1(n);
  for (int i = 0; i < n; i++) {
    int nd = 0;
    for (int j = 0; j < (int) s[i].size(); j++) {
      int x = (int) (s[i][j] - 'a');
      if (trie[nd][x] == -1) {
        trie[nd][x] = (int) trie.size(); 
        trie.push_back(vector<int>(A, -1));
      }
      nd = trie[nd][x];
      if (j == (int) s[i].size() - 2) {
        f0[i] = nd;
      }
      if (j == (int) s[i].size() - 1) {
        f1[i] = nd;
      }
    }  
  }
  int sz = (int) trie.size();
  vector<int> dp(sz);
  for (int i = 0; i < n; i++) {
    int ptr = i;
    while (ptr + 1 < n && f0[ptr + 1] == f0[i]) {
      ptr += 1;
    }
    int cnt = ptr - i + 1;
    int ndp = dp[f0[i]] + cnt;
    for (int j = i; j <= ptr; j++) {
      dp[f1[j]] = max(dp[f1[j]], ndp);
    }
    i = ptr;
  }
  cout << *max_element(dp.begin(), dp.end()) << '\n'; 
  return 0;
}

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