結果
| 問題 | 
                            No.2162 Copy and Paste 2
                             | 
                    
| コンテスト | |
| ユーザー | 
                             miscalc
                         | 
                    
| 提出日時 | 2021-08-28 02:30:39 | 
| 言語 | C++17  (gcc 13.3.0 + boost 1.87.0)  | 
                    
| 結果 | 
                             
                                AC
                                 
                             
                            
                         | 
                    
| 実行時間 | 2,156 ms / 7,000 ms | 
| コード長 | 2,532 bytes | 
| コンパイル時間 | 2,744 ms | 
| コンパイル使用メモリ | 211,500 KB | 
| 最終ジャッジ日時 | 2025-01-24 03:50:02 | 
| 
                            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 | 
|---|---|
| sample | AC * 3 | 
| other | AC * 26 | 
ソースコード
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#include <atcoder/lazysegtree>
using namespace atcoder;
int mymax(int a, int b)
{
  return max(a, b);
}
int e()
{
  return 0;
}
// https://qiita.com/keymoon/items/11fac5627672a6d6a9f6
class rollinghash
{
public:
  const ll MOD = (1LL << 61) - 1;
  const ll MASK61 = MOD;
  const ll MASK31 = (1LL << 31) - 1;
  const ll MASK30 = (1LL << 30) - 1;
  const ll POSITIVISER = 3 * MOD;
  ll Base;
  ll mul(ll a, ll b)
  {
    ll au = a >> 31; // (a / MASK31)
    ll ad = a & MASK31; // (a % MASK31)
    ll bu = b >> 31;
    ll bd = b & MASK31;
    ll m = au * bd + ad * bu;
    ll mu = m >> 30;
    ll md = m & MASK30;
    return au * bu * 2 + mu + (md << 31) + ad * bd;
  }
  ll calcmod(ll x)
  {
    ll xu = x >> 61;
    ll xd = x & MASK61;
    ll ret = xu + xd;
    if (ret >= MOD)
      ret -= MOD;
    return ret;
  }
  vector<ll> powmem;
  vector<ll> hash;
  rollinghash(string S)
  {
    ll N = S.size();
    srand((unsigned)time(NULL));
    Base = rand() % 1024 + 256;
    powmem.resize(N + 1);
    powmem.at(0) = 1;
    for (ll i = 0; i < N; i++)
    {
      powmem.at(i + 1) = calcmod(mul(powmem.at(i), Base));
    }
    
    hash.resize(N + 1);
    hash.at(0) = 1;
    for (ll i = 0; i < N; i++)
    {
      hash.at(i + 1) = calcmod(mul(hash.at(i), Base) + S.at(i));
    }
  }
  ll sub(ll pos, ll len)
  {
    return calcmod(hash.at(pos + len) + POSITIVISER - mul(hash.at(pos), powmem.at(len)));
  }
};
int main()
{
  string S;
  cin >> S;
  int N = S.size();
  S += string(N + 10, '.');
  rollinghash rh(S);
  vector<int> Z(N);
  for (int i = 0; i < N; i++)
  {
    int ok = 0, ng = N + 1;
    while (abs(ok - ng) > 1)
    {
      int mid = (ok + ng) / 2;
      if (rh.sub(0, mid) == rh.sub(i, mid))
        ok = mid;
      else
        ng = mid;
    }
    Z.at(i) = ok;
  }
  for (int i = 0; i < N; i++)
  {
    Z.at(i) = min(Z.at(i), i);
  }
  vector<vector<int>> invZ(N);
  set<int> st;
  for (int i = 0; i < N; i++)
  {
    if (Z.at(i) >= 2)
    {
      invZ.at(Z.at(i)).push_back(i);
      st.emplace(i);
    }
  }
  st.emplace(N + 1);
  lazy_segtree<int, mymax, e, int, mymax, mymax, e> dp(N + 1);
  for (int j = 2; j < N; j++)
  {
    int cnt = dp.get(j) + j - 2;
    int i = *st.begin() + j;
    while (i < N + 1)
    {
      dp.apply(i, N + 1, cnt);
      cnt += j - 1;
      i = *st.lower_bound(i) + j;
    }
    for (auto ii : invZ.at(j))
    {
      st.erase(ii);
    }
  }
  int ans = N - dp.get(N);
  cout << ans << endl;
}
            
            
            
        
            
miscalc